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 Post subject: 5.7x28 in a contender barrel
PostPosted: Wed Feb 03, 2010 11:15 pm 
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I have been reading some of the 5.7 info on reloading, just wondering if anyone has valid information on loads for the single shot contender and what the prefered rate of rifling twist might be be? I have been reloading with my father for many years but this is a new cartridge for me and I am facinated with it even though it is not the most popular.

Thanks,

J


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Thu Feb 04, 2010 4:45 am 
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Welcome, there are a few here who reload for contenders. I think there is a bit of data posted too.



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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Thu Feb 04, 2010 7:22 am 
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I've been having the urge to order a spare 16" AR57 barrel and use it to build a bolt gun using an existing action - or just making my own........either way, I think it would be cool to have a lightweight bolt gun in this caliber that feeds from a FiveseveN mag.....


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Thu Feb 04, 2010 8:10 am 
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Sharky, I think that's being done over on another board, he's pretty well along, but I cant find the link ATM. Someone knows what I'm talkin about.


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Thu Feb 04, 2010 10:01 am 
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If someone would post a link to that site/thread - that would be awesome! I would love to see how he/she is doing it and if they are using an existing action or not.....


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Fri Feb 05, 2010 5:43 pm 
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Could it be this one?

viewtopic.php?f=16&t=1667&p=26398&hilit=bolt#p26398



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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Fri Feb 05, 2010 5:47 pm 
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Aye! that's the one. I was way too tired to find it. But boy, I'd love to have the time and resources to build one of those for myself...


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Fri Feb 05, 2010 7:04 pm 
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There are several more on that site, including work on a .17x28. More on the 5.7x28 AR here. http://www.saubier.com/forum/showthread.php?t=8086&highlight=5.7x28 I like what he's done with magazines.



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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Fri Feb 05, 2010 8:24 pm 
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Oh yeah, saw that one - but that's not what I was talking about......

I want to use an AR57 barrel to build a lightweight bolt-action that feeds from FiveseveN mags.


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Fri Feb 05, 2010 9:08 pm 
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I see there is some interest in using the 5.7 case in weapons, mainly Bolt action, AR platforms and CT's.

Here is some load data that I have tested and chrono in my custom made 591 Rem action, 24" bbl, chambered with a very tight reamer spec's for the 5.7 case. The avg case cap for my 22 Kit Fox case is 12.4 grs with the 05 yr headstamp of 5.7 brass. My KF case has the neck/shoulder moved back to a length of .200" (I hate short necked cases) from a standard 5.7 case. Due to the volume of data, I will load 1 bullet weight per post, as I am having trouble loading/posting to this site.

Please read the info at the start and end before using/loading with this data.

All these loads are considered MAXIMUM in my weapon, USE AT YOUR OWN RISK.

All these loads have Very Heavy Bullet Pull, meaning there was NO EXP Ball used in resizing these cases.

Any load data (Grain amounts) with an * after the amount was A MAXIMUM LOAD.

DO NOT USE IN A PISTOL-OR OTHER BLOW BACK TYPE WEAPONS-FOR USE IN A BOLT ACTION/TC BBL'S OR AR PLATFORM TYPE WEAPONS ONLY- USE AT YOUR OWN RISK

Bullet-Weight-Powder- Grns- Vel- OAL

BERGER 30 grn
AA Solo 1000-4.4-Rem 7.5-2455-1.546"
AA Solo 1000-4.6*-Rem 7.5-2515-1.546"

AA Nitro 100-4.3-Rem 7.5-2529-1.546"
AA Nitro 100-4.5*-Rem 7.5-2593-1.546"

AA Solo 1250-5.1-Rem 7.5-2575-1.546"
AA Solo 1250-5.3*-Rem 7.5-2632-1.546"

AA No.2-5.2-Rem 7.5-2653-1.546"
AA No.2-5.4*-Rem 7.5-2718-1.546"

AA No.5-7.2-Rem 7.5-2928-1.546"
AA No.5-7.4*-Rem 7.5-2987-1.546"

AA No.7-8.6-Rem 7.5-3018-1.546"
AA No.7-8.8*-Rem 7.5-3077-1.546"

AA No.9-9.3-Rem 7.5-2967-1.546"
AA No.9 -9.5*-Rem 7.5-3025-1.546"

AA 4100-10.5-Rem 7.5-2949-1.546"
AA 4100-10.7*-Rem 7.5-3007-1.546"

Bullseye 5.0-Rem 7.5-2741-1.546"
Bullseye 5.2*-Rem 7.5-2804-1.546"

Unique 5.6-Rem 7.5-2768-1.546"
Unique 5.8*-Rem 7.5-2826-1.546"

Power Pistol-6.7-Rem 7.5-2993-1.546"
Power Pistol-6.9*-Rem 7.5-3055-1.546"

2400 9.5-Rem 7.5-3035-1.546"
2400 9.7*-Rem 7.5-3095-1.546"

Universal 5.1-Rem 7.5-2619-1.546"
Universal 5.3*-Rem 7.5-2676-1.546"

HS-6-6.9-Rem 7.5-2820-1.546"
HS-6-7.1*-Rem 7.5-2872-1.546"

H-110-10.9-Rem 7.5-2798-1.546"
H-110-11.1*-Rem 7.5-2856-1.546"

Norma-R-123-10-Rem 7.5-3213-1.546"
Norma-R-123-10.2*-Rem 7.5-3269-1.546"

Silhouette-6.2-Rem 7.5-2763-1.546"
Silhouette-6.4*-Rem 7.5-2815-1.546"

True Blue-6.7-Rem 7.5-2800-1.546"
True Blue-6.9*-Rem 7.5-2853-1.546"

Enforcer-10.2-Rem 7.5-3043 -1.546"
Enforcer-10.4*-Rem 7.5-3102-1.546"

VV N320- 4.5-Rem 7.5-2467-1.546"
VV N320-4.7*-Rem 7.5-2526-1.546"

VV N330-5.2-Rem 7.5-2612-1.546"
VV N330-5.4*-Rem 7.5-2669-1.546"

VV N340-5.6-Rem 7.5-2685-1.546"
VV N340-5.8*-Rem 7.5-2742-1.546"

VV 3N37-6.6-Rem 7.5-2817-1.546"
VV 3N37-6.8*-Rem 7.5-2871-1.546"

VV N 350-6.5-Rem 7.5-2811-1.546"
VV N 350-6.7*-Rem 7.5-2866-1.546"

VV 3N38- 8.0-Rem 7.5-2946-1.546"
VV 3N38-8.2*-Rem 7.5-3004-1.546"

Win 231-5.2-Rem 7.5-2574-1.546"
Win 231-5.4*-Rem 7.5-2629-1.546"

Win 540-6.7-Rem 7.5-2802-1.546"
Win 540-6.9*-Rem 7.5-2854-1.546"

My Load criteria is at least 55% load ratio, and at least 2500 FPS for the bullet weight tested. Blank areas are being tested or have missing/incorrect data and are being rechecked and tested again.


When the following was found/noted for any of the 3 rounds tested, Case head expansion of +.0001 was measured on any of the 3 test rounds,(used once fired brass, in the 5.7x28 caliber), a .1 th grain reduction from .0001 case head expansion, was used as max case load and noted as ( * ). USE AT YOUR OWN RISK-SAFE IN MY FIREARMS-USE AT YOUR OWN RISK.

Due to the difficulty of posting this info here, I will supended adding the rest untill I can figure out what I am doing wrong.
Tia,
Don


Last edited by nvreloader on Sat Feb 06, 2010 11:01 am, edited 1 time in total.

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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 9:24 am 
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Joined: Tue Aug 19, 2008 9:13 am
Posts: 4659
Location: North Carolina
iraqimedic wrote:
I have been reading some of the 5.7 info on reloading, just wondering if anyone has valid information on loads for the single shot contender and what the prefered rate of rifling twist might be be? I have been reloading with my father for many years but this is a new cartridge for me and I am facinated with it even though it is not the most popular.



I have an 18.5" T/C contender with a 1 in 12 twist. The T/C custom shop would not change the twist rate on the rifling. The FsN and PS90 typically use a 1 in 9" twist. However, 1in12 has worked out fine for me. The gun is very accurate and I have not noticed any stability problems. The only reason I could see a good use for faster rifling would be if I wanted to shoot heavier bullets (>55gr) w/ subsonic loads.

I also have a few loads posted for the T/C that you can check out if you search for it.



Wow. Tremendous work Don! :thumb:

I kinda got a little lost when you were talking about the 22 Kit Fox case. What is that?

You were certainly right to warn against use of these loads in a blow-back weapon. Using a T/C or non-blowback weapon allows for the use of a much wider range of powders. Having done some of my own research, I can say that slower pistol powders like Acc#7&9, Blue Dot, and HS7 work great. I hope to be testing even slower powders like Win 296 and possibly H110 very soon.

As I've mentioned before, I have available some virgin 5.7x28 brass specifically made for the T/C (or other non blowback weapons). These cases have significantly more volume than your average FN case, so it allows for the use of powders previously too voluminous to fit in the case. There's more info here: viewtopic.php?f=19&t=5709&hilit=EA+T%2FC+brass+contender


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 10:08 am 
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Posts: 50
[quote="Grantness"] I kinda got a little lost when you were talking about the 22 Kit Fox case. What is that? "

Grantness,
The 22 Kit Fox is just a standard 5.7 case with the neck and shoulder moved back to create a .200" long neck, (I hate short neck cases). The average case case is about 12.4 grs with the 05 yr headstamp case, these were the ones I was having trouble with in the 22 KF and 17 Kit Fox when I started loading for them. I have found that using other yr headstamp 5.7 cases, there has been NO HIGH pressure spikes or other problems.

I would love to have some of your TC 5.7 brass to experiment with. Since I don't have an OEM or factory loaded case for the 5.7, I'll send you a collectors samples of the Kit Fox series of case for exchange of some OEM/factory cases etc, ( I have a cartridge collection also). If you are agreeable to this trade, let me know.

I have learned that the 5.7 case can only take a LIMITED amount of pressure when reloading as there is very little case head strength, take the measurement of a small rifle primer = .175" and subtract this from the total outside measurement of the extraction groove = .262" + or - and the remaining difference of .088" divide by 2 = about .044" of brass supporting the weakest part of the case, it does not hold up to high pressure for very long, as you are aware of.

This is one case that you had better be aware of it's limits or you can explode things in a heart beat. I have found that the tighter the chamber spec's the better the load performance can be found, TO A CERTAIN POINT, then nothing matters as it all goes down hill from there.

I have the rest of the load data for the 22KF cases, but I am having problems posting to this site. I don't feel comfortable with the way the data is showing up as I posted it. (have limited experience with this plastic box). I will send you all the complete data if you want it, this load data is in an XL program, let me know and it's yours to study etc.
Tia,
Don


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 11:36 am 
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Joined: Sun Jan 31, 2010 2:01 pm
Posts: 50
Here is the next load data for the:

Please read the info at the start and end before using/loading with this data.

All these loads are considered MAXIMUM in my weapon, USE AT YOUR OWN RISK.

All these loads have Very Heavy Bullet Pull, meaning there was NO EXP Ball used in resizing these cases.

Any load data (Grain amounts) with an * after the amount was A MAXIMUM LOAD.

DO NOT USE IN A PISTOL-OR OTHER BLOW BACK TYPE WEAPONS-FOR USE IN A BOLT ACTION/TC BBL'S OR AR PLATFORM TYPE WEAPONS ONLY- USE AT YOUR OWN RISK

Bullet-Weight-Powder- Grns- Vel- OAL

Speer 33 gr Bullets

AA No.2-5.3-Rem 7.5-2562-1.422"
AA No.2-5.5*-Rem 7.5-2622-1.422"

AA No. 5-7.3-Rem 7.5-2841-1.422"
AA No. 5-7.5*-Rem 7.5-2895-1.422"

AA No. 7-8.6-Rem 7.5-2912-1.422"
AA No. 7-8.8*-Rem 7.5-2967-1.422"

AA No.9-9.4-Rem 7.5-2896-1.422"
AA No.9-9.6*-Rem 7.5-2950-1.422"

AA 4100-10.6-Rem 7.5-2886 -.422"
AA 4100-10.8*-Rem 7.5-2940-1.422"

Bullseye 5.1-Rem 7.5-2636-1.422"
Bullseye 5.3*-Rem 7.5-2704-1.422"

Unique 5.6-Rem 7.5-2644-1.422"
Unique 5.8*-Rem 7.5-2698-1.422"

Power Pistol-6.8-Rem 7.5-2902-1.422"
Power Pistol-7.0*-Rem 7.5-2959-1.422"

2400-9.5-Rem-7.5-2940-1.422"
2400-9.7*-Rem 7.5-2996-1.422"

Universal-5.1-Rem 7.5-2497-1.422"
Universal-5.3*-Rem 7.5-2552-1.422"

HS-6-7.0-Rem 7.5-2725-1.422"
HS-6-7.2*-Rem 7.5-2774-1.422"

H-110-10.9-Rem 7.5-2798-1.422"
H-110-11.1*-Rem 7.5-2856-1.422"

Norma R-123-10.0-Rem 7.5-3103-1.422"
Norma R-123-10.2*-Rem 7.5-3153-1.422"

Silhouette-6.2-Rem 7.5-2639-1.422"
Silhouette-6.4*-Rem 7.5-2689-1.422"

True Blue-6.7-Rem 7.5-2679-1.422"
True Blue -6.9*-Rem 7.5-2728-1.422"

Enforcer-10.2-Rem 7.5-2948 -.422"
Enforcer-10.4*-Rem 7.5-3003-1.422"

VV N330-5.2-Rem 7.5-2491-1.422"
VV N330-5.4*-Rem 7.5-2616-1.422"

VV N340-5.6-Rem 7.5-2563-1.422"
VV N340-5.8*-Rem 7.5-2616-1.422"

VV 3N37-6.7-Rem 7.5-2721-1.422"
VV 3N37-6.9*-Rem 7.5-2772-1.422"

VV N 350-6.5-Rem 7.5-2689-1.422"
VV N 350-6.7*-Rem 7.5-2741-1.422"

VV 3N38-8.0-Rem 7.5-2838-1.422"
VV 3N38-8.2*-Rem 7.5-2891-1.422"

VV N105-8.2-Rem 7.5-2923-1.422"
VV N105-8.4*-Rem 7.5-2976-1.422"

Win WAP-6.2-Rem 7.5-2636-1.422"
Win WAP-6.4*-Rem 7.5-2686-1.422"

Win 540-6.7-Rem 7.5-2680-1.422"
Win 540-6.9*-Rem 7.5-2729-1.422"

My Load criteria is at least 55% load ratio, and at least 2500 FPS for the bullet weight tested. Blank areas are being tested or have missing/incorrect data and are being rechecked and tested again.


When the following was found/noted for any of the 3 rounds tested, Case head expansion of +.0001 was measured on any of the 3 test rounds,(used once fired brass, in the 5.7x28 caliber), a .1 th grain reduction from .0001 case head expansion, was used as max case load and noted as ( * ). USE AT YOUR OWN RISK-SAFE IN MY FIREARMS-USE AT YOUR OWN RISK.
Tia,
Don


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 12:04 pm 
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Joined: Sun Jan 31, 2010 2:01 pm
Posts: 50
Here is the next load data for the:

Please read the info at the start and end before using/loading with this data.

All these loads are considered MAXIMUM in my weapon, USE AT YOUR OWN RISK.

All these loads have Very Heavy Bullet Pull, meaning there was NO EXP Ball used in resizing these cases.

Any load data (Grain amounts) with an * after the amount was A MAXIMUM LOAD.

DO NOT USE IN A PISTOL-OR OTHER BLOW BACK TYPE WEAPONS-FOR USE IN A BOLT ACTION/TC BBL'S OR AR PLATFORM TYPE WEAPONS ONLY- USE AT YOUR OWN RISK

Bullet-Weight-Powder- Grns- Vel- OAL

Hornaday 35 gr VMAX Bullets

AA No. 5-7.0-Rem 7.5-2736-1.451"
AA No. 5-7.2*-Rem 7.5-2790-1.451"

AA No. 7-8.2-Rem 7.5-2797-1.451"
AA No. 7-8.4*-Rem 7.5-2851-1.451"

AA No.9-9.0-Rem 7.5-2792-1.451"
AA No.9-9.2*-Rem 7.5-2846 -.451"

AA 4100-10.2-Rem 7.5-2798-1.451"
AA 4100-10.4*-Rem 7.5-2852-1.451"

Bullseye 4.9-Rem 7.5-2514-1.451"
Bullseye 5.1*-Rem 7.5-2573-1.451"

Unique 5.3-Rem 7.5-2521-1.451"
Unique 5.5*-Rem 7.5-2575-1.451"

Power Pistol-6.4-Rem 7.5-2759-1.451"
Power Pistol-6.6*-Rem 7.5-2817-1.451"

2400-9.1-Rem 7.5-2837-1.451"
2400-9.3*-Rem 7.5-2893-1.451"

HS-6-6.6 -Rem 7.5-2593-1.451"
HS-6-6.8*-Rem 7.5-2643-1.451"

Norma R-123-9.5-Rem 7.5-2972-1.451"
Norma R-123-9.7*-Rem 7.5-3022-1.451"

Silhouette-5.8-Rem 7.5-2500-1.451"
Silhouette-6.1*-Rem 7.5-2575-1.451"

True Blue-6.4-Rem 7.5-2570-1.451"
True Blue -6.6*-Rem 7.5-2619-1.451"

Enforcer-9.8-Rem 7.5-2853-1.451"
Enforcer-10.0*-Rem 7.5-2908-1.451"

VV N340-5.3-Rem 7.5-2443-1.451"
VV N340-5.5*-Rem 7.5-2497-1.451"

VV 3N37-6.3-Rem 7.5-2585-1.451"
VV 3N37-6.5*-Rem 7.5-2636-1.451"

VV N 350-6.4-Rem 7.5-2577-1.451"
VV N 350 -6.6*-Rem 7.5-2629-1.451"

VV 3N38-7.7-Rem 7.5-2743-1.451"
VV 3N38-7.9*-Rem 7.5-2796-1.451"

VV N105-7.8-Rem 7.5-2799-1.451"
VV N105-8.0*-Rem 7.5-2853-1.451"

Win WAP-5.9-Rem 7.5-2523-1.451"
Win WAP-6.1*-Rem 7.5-2573-1.451"

Win 540-6.4-Rem 7.5-2571-1.451"
Win 540-6.6*-Rem 7.5-2621-1.451"


My Load criteria is at least 55% load ratio, and at least 2500 FPS for the bullet weight tested. Blank areas are being tested or have missing/incorrect data and are being rechecked and tested again.


When the following was found/noted for any of the 3 rounds tested, Case head expansion of +.0001 was measured on any of the 3 test rounds,(used once fired brass, in the 5.7x28 caliber), a .1 th grain reduction from .0001 case head expansion, was used as max case load and noted as ( * ). USE AT YOUR OWN RISK-SAFE IN MY FIREARMS-USE AT YOUR OWN RISK.
Tia,
Don


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 12:04 pm 
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Joined: Tue Aug 19, 2008 9:13 am
Posts: 4659
Location: North Carolina
Great data. :thumb:

So are you using dies to lengthen the neck on the Kit Fox case or do you purchase the brass that way? You use it in a normal 5.7x28 chamber, and there arent any headspace problems or anything like that?

The case head is definitely the weak point on my T/C brass. Its straight-walled on the inside, so there is not the internal taper or webbing like the FN cases have (which accounts for the extra volume). This is precisely why the case needs to be fully supported during firing and why you cant use an FsN, PS90, AR57, etc.

I'll PM you shortly about making a trade.


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 12:17 pm 
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Posts: 50
Here is the next load data for the:

Please read the info at the start and end before using/loading with this data.

All these loads are considered MAXIMUM in my weapon, USE AT YOUR OWN RISK.

All these loads have Very Heavy Bullet Pull, meaning there was NO EXP Ball used in resizing these cases.

Any load data (Grain amounts) with an * after the amount was A MAXIMUM LOAD.

DO NOT USE IN A PISTOL-OR ANY OTHER BLOW BACK TYPE WEAPONS-FOR USE IN A BOLT ACTION/TC BBL'S OR AR PLATFORM TYPE WEAPONS ONLY- USE AT YOUR OWN RISK

Bullet-Weight-Powder- Grns- Vel- OAL

Hornaday 40 gr VMax

AA No. 5-6.7-Rem 7.5-2536-1.623"
AA No. 5-6.9*-Rem 7.5-2587-1.623"

AA No. 7-7.9-Rem 7.5-2618-1.623"
AA No. 7-8.1*-Rem 7.5-2669-1.623"

AA No.9-8.7-Rem 7.5-2627-1.623"
AA No.9-8.9*-Rem 7.5-2678-1.623"

AA 4100-9.8-Rem 7.5-2625-1.623"
AA 4100-10.0*-Rem 7.5-2676-1.623"

Power Pistol-6.2-Rem 7.5-2577-1.623"
Power Pistol-6.4*-Rem 7.5-2631-1.623"

2400-8.8-Rem 7.5-2675-1.623"
2400-9.0*-Rem 7.5-2728-1.623"

H-110-10.9-Rem 7.5-2708-1.623"
H-110-11.1*-Rem 7.5-2760-1.623"

Lil-Gun-10.7-Rem 7.5-2795-1.623"
Lil-Gun-10.9*-Rem 7.5-2849 -1.623"

Norma R-123-9.1-Rem 7.5-2770-1.623"
Norma R-123-9.3*-Rem 7.5-2817-1.623"

Enforcer 9.5-Rem 7.5-2697-1.623"
Enforcer 9.7*-Rem 7.5-2749-1.623"

VV 3N38-7.4-Rem 7.5-2555-1.623"
VV 3N38-7.6*-Rem 7.5-2605-1.623"

VV N105-7.5-Rem 7.5-2607-1.623"
VV N105-7.7*-Rem 7.5-2659-1.623"

Win 296-10.6-Rem 7.5-2810-1.623"
Win 296-10.8*-Rem 7.5-2867-1.623"

My Load criteria is at least 55% load ratio, and at least 2500 FPS for the bullet weight tested. Blank areas are being tested or have missing/incorrect data and are being rechecked and tested again.


When the following was found/noted for any of the 3 rounds tested, Case head expansion of +.0001 was measured on any of the 3 test rounds,(used once fired brass, in the 5.7x28 caliber), a .1 th grain reduction from .0001 case head expansion, was used as max case load and noted as ( * ). USE AT YOUR OWN RISK-SAFE IN MY FIREARMS-USE AT YOUR OWN RISK.
Tia,
Don


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 12:18 pm 
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Joined: Sun Dec 13, 2009 11:56 am
Posts: 148
On the few cases I have CNC turned from barstock (7.62 X 39 and .50 Beo), I have drilled out the inside undersized and then bored out the remainder. This allows me to generate the proper wall thickness and webbing taper, I'd be a little apprehensive of using a cartridge case with no webbing even in a bolt gun - but I guess it works with care......


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Sat Feb 06, 2010 12:34 pm 
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Joined: Sun Jan 31, 2010 2:01 pm
Posts: 50
[quote="Grantness"] So are you using dies to lengthen the neck on the Kit Fox case".

I use standard RCBS 5.7 dies and then chucked them into the lathe and shortened the sizer die base to create the required neck length I wanted.

I full length resize the brass to set the chamber spec's required. I then fireform all brass in my fire form jig, (this info is posted on the Saubier web site, along with photo's etc), to set the head space for the chamber, then the brass is reloaded and tested with the load data being tested.

I have NO SHOULDER movement when using the 5.7 cases in my bolt action, this last batch of brass has been reloaded over 10 times, In the 17 KF case, (necked down 5.7 case), I can drive a 17 VMax bullet at just under 3900+ fps out of another of my Custom made Rem 591 SS actions.
I have made adaptor to use a 15+ rd mag with this action, but I am having trouble getting the feeding perfect). I call this weapon my RELOADABLE Rim FIre, cheaper to shoot than the 17HRM, better performance and RELOADABLE.
Tia,
Don


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Wed Feb 10, 2010 2:22 pm 
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Joined: Sun Jan 31, 2010 2:01 pm
Posts: 50
nvreloader wrote:
Grantness wrote:
So are you using dies to lengthen the neck on the Kit Fox case".

I use standard RCBS 5.7 dies and then chucked them into the lathe and shortened the sizer die base to create the required neck length I wanted.

I full length resize the brass to set the chamber spec's required. I then fireform all brass in my fire form jig, (this info is posted on the Saubier web site, along with photo's etc), to set the head space for the chamber, then the brass is reloaded and tested with the load data being tested.

I have NO SHOULDER movement when using the 5.7 cases in my bolt action, this last batch of brass has been reloaded over 10 times, In the 17 KF case, (necked down 5.7 case), I can drive a 17 VMax bullet at just under 3900+ fps out of another of my Custom made Rem 591 SS actions.
I have made adaptor to use a 15+ rd mag with this action, but I am having trouble getting the feeding perfect). I call this weapon my RELOADABLE Rim FIre, cheaper to shoot than the 17HRM, better performance and RELOADABLE.
Tia,
Don

Added info;
Grantness,
I remove about .025-.030" from the bottom of the size die, then sized the OEM 5.7 cases down about .020" or untill the neck length is .200" long. The extra few thousands left are used to set the shoulder back after the first fire forming, being that the shoulder/neck area of the 5.7 cases is very tough to form if the pressure is not high enough the first time, it may take a second fire forming to get the correct spec's for my chamber etc.

Being that I am a varmint hunter, I usually only load and check out the lightest and fastest powder/bullets possible for each of the KF calibers. I have tested and checked several other bullets (slightly heavier weights up to 55grs) than those listed.

Both of the KF rifles 17/22 get used very heavy during the summer months thinning out the sage bunnies in the hay fields around here, not uncommon to shoot in excess of 200+ bunnies per night, with an average of 1500-2000 rds per month, the local ranchers really like the quite report and no bullets singing off thru the fields when the ranch hands are out doing their nightly thing of changing irriagtion ditches or baling etc. These rifle have also collected several Badgers out to 150+ yds and more than their fair share of yeller dogs when that time comes around.
Tia,
Don
ps, I have your sample cases ready to mail just need an address (via pm), when you are ready.


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 Post subject: Re: 5.7x28 in a contender barrel
PostPosted: Mon Feb 15, 2010 11:57 pm 
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Joined: Wed Feb 03, 2010 10:56 pm
Posts: 4
Thanks for the info guys, I will be sifting through the info as I can on all the other threads. I am leaning toward a 1 in 10 twist. I have done some shooting with the longer twist rates with no problem as well as the 1 in 9 twist rate and a variety of bullet lengths and weights. I am looking at a 45 to 55 gr bullet for now.

I have my action, now to get the pistol and rifle barrels and start working on some loads.

Thanks again,

James


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