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View Full Version : Anyone done a subsonic load with ss109 slugs?


Kogashuko
01-08-2006, 10:56 PM
Considered once or twice getting into reloading but havnt. This would be interesting to see.

Fuse
01-08-2006, 11:11 PM
not yet let me get the rest of my equip and im going to test it among other things.

Medula Oblongata
01-09-2006, 11:59 AM
I have successfully loaded 55grn FMJBT and 55grn Sierra GameKing and MatchKing bullets into the 5.7x28mm case. As of yet I have not experimented with 62grn bullets, but I have used a single 69grn bullet with little success (round was too long to sit in magazine and bullet contacted the rifling stopping the slide from fully closing). I didn't fire the 69grn, I thought it too dangerous to try.

Here are some conversations on 55 grain loads:

http://fivesevenforum.com/forums/showthread.php?t=892

http://fivesevenforum.com/forums/showthread.php?t=1096

Hope this helps!

Kogashuko
01-10-2006, 08:44 PM
I think as far as the ss109 62grn goes that it is the same size but not 100% sure.

Evan Stevens
01-12-2006, 11:39 PM
That would be dangerous. Solids by Barnes in 35 grains will probably give the best penetration. How did the 55 grainer shoot? Maybee we should get a license and manufacture ammo, I can program CNC machines. I have Master Cam 9 and Auto CAD 2000 software. I learned at my local trade school. I am also interested in manufacturing firearms. LEGALLY with a FFL. You wouldn't need big machines to do this.

Medula Oblongata
01-13-2006, 08:33 AM
That would be dangerous. Solids by Barnes in 35 grains will probably give the best penetration. How did the 55 grainer shoot? Maybee we should get a license and manufacture ammo, I can program CNC machines. I have Master Cam 9 and Auto CAD 2000 software. I learned at my local trade school. I am also interested in manufacturing firearms. LEGALLY with a FFL. You wouldn't need big machines to do this.


55grn was mild with little more recoil than a factory SS192. I used 3.3grns of Vihtavhouri 3N37, and with the aid of a chrono I think I could push it even a little faster. The pressure was not as high as 6.0 of 3N37 with a 40 grain bullet. I did not have a chrono at the time, but it was clearly faster than the speed of sound. Also, it shot about 1 1/2 inches low at 7 meters which is quite odd. The group size, at 7 meters, was about the same as with SS192 or any of my handloads... 1/2".

Usually a heavier bullet will shoot higher than a light one because the bullet stays in the barrel longer creating a heavier reciol impulse. However, since I know little about the mechanics of delayed-blowback weapons I cannot tell if this is usual. It would explain why the SS196 shoots low with the same powder charge as the 195. Im curious to get my hands on some 197 so I can pull the rounds and weigh the powder charge. Boy, oh boy, I with there was some factory data available!!!

Evan Stevens
01-13-2006, 04:33 PM
There should be some data avaible in 2006 reloading manuals. I have heard of a bolt gun being avaible soon. What about Blue Dot for the 55 grain loads? I will have to look at my burn rate table as I am not fimiliar with 3n37. I would like to get as much speed out of a 55 grain load as safely possible. .5 is a great group with any load from a semi auto pistol. I sure wish there were 35 grain fmjbt bullets avaible. I think the MP5 shoots low with the subsonic 147 grain loads for use with suppressor. This may be due to delayed blowback.

Medula Oblongata
01-14-2006, 09:29 AM
I have not found Blue Dot to be particularily suitable for the 5.7x28. Im sure that some others will disagree, but that is my opinion. Right now, my favorite powders are Hodgdon HS6 and RamShot TrueBlue powder (which appears visibly identicle to the factory powder used in the SS195LF. I say visibly identicle, but it may be another powder altogether).

I find BlueDot to be exceptionally dirty. HS6 and TrueBlue are exceedingly clean. I also don't like the smoke and flash of BlueDot (or any of the Dot powders for that matter) and to me it has an offensive odor. It also seems to be rather bulky in this case. The 5.7x28 seems to have a VERY short peak pressure and cannot fully combust the larger powders like the Dots, whereas the HS6, 3N37, TrueBlue, are very small flakes, rods, and balls that do fully combust leaving extremely little residue, little smoke and little flash. The velocities and group sizes are also more consistant that what I was ablt to get out of BlueDot.

Evan Stevens
01-16-2006, 04:13 AM
I will stick with HS6 as I have heard many good things about this powder. The dots do smell funny, and are dirty. I use a-lot of the dots in my 44mag loads, but for my good loads it is H110. I am still waiting for my case holder so I can't trim my cases yet. I hope it comes soon so I can get in on the development of this fine round. I think it has much potential to unlock. Some new powders may come about and be very helpful.

748
01-16-2006, 10:34 AM
HS-6, AA9, AA7,Accurate Number 9
Are powders that I have found people loading.
Plus what ever stickies there are.