View Full Version : Accurate #5 & #7 reload data for 5.7x28

01-13-2007, 10:36 AM
Western Powders Inc has posted official reload data for the 5.7x28 on their website.




01-13-2007, 10:52 AM
Thanks for the links.

01-15-2007, 06:43 PM
They strongly recommend only flat base bullets be used. Now I am confused, why would they say that?

The various boat-tailed bullets are easy to load. The FN bullets are boat tailed. Is there something that I am missing here?

It is good to see detailed data such as this. I wish the other component manufacturers would list some data.

Medula Oblongata
01-15-2007, 09:21 PM
I have no idea as to why they would say that, except for the increased neck tension. I have loaded boat tail rounds almost exclusively, as the flat base are a real pain to use.

I have loaded more than 45k rounds in the last 3+ years without any problem. I think I will keep going the way I have and 'take my chances.'

01-16-2007, 02:05 PM
45K of 5,7 !!! wow, that is a lot of lever pull on a single stage.
On average, how many time can acase be reloaded.

Medula Oblongata
01-16-2007, 05:16 PM
# of reloads depends on how fast you are pushing the bullets. +P and +P+ you will get 2 loadings (I don't recommend using these for anything other than shites and giggles, as extraction is extremely unreliable), but standard pressure will get you anywhere between 9 and 12 depending upon bullet used. ***NEVER NEVER NEVER*** remove the factory primer crimp on this brass, doing so will shorten the lifespan. The primers will seat without it being removed. If it doesn't want to go in, spin the case a little and the primer will seat.

Yes, 45k is a lot of rounds to do single stage, but thats just 5.7x28. I also loaded and shot more than 90k of .45 ACP during that time. I was shooting around 3 - 4 thousand rounds a week a couple of years ago in a quest to make some cash, find sponsors, and see how durable my HK's were.

My USP ELITE has more than 75 thousand rounds through it (almost exclusively HC lead reduced target loads) and I can find no measurable wear on any critical components. I'm sure the barrel will eventually wear out, but I'll shoot it until it does.

Anyway, back to the point. I have a large pile of brass to go through (30k or so) and I don't figure I will ever need to buy any more.

01-17-2007, 10:32 AM
thanks for the dope. sundance

01-18-2007, 06:18 PM
I took into consideration that the factory loads may be on the "weak side" but even at that, I was startled by the recoil and the speed of the bolt blowback on my PS90 using the starting load of 7gr of AA#7 with a 40gr Vmax. I was trying to copy the SS197, just because that is all I have shot and hoped to compare the two loads.
I haven't measured the primer pockets but it looks to me like the 7gr load has stretched the pocket. I next tried 6.5grns and it seemed a bit milder. I didn't have access to a crony, so no data of that type avaliable, sorry. Had anyone else given this data a try?

I will attempt to add an image of the 3 loads.

http://img392.imageshack.us/img392/4620/2e5mcnacw2.th.jpg (http://img392.imageshack.us/my.php?image=2e5mcnacw2.jpg)

01-18-2007, 06:21 PM
About 800x or less, or it gets thumbnailed. :)

01-18-2007, 06:21 PM
I guess someone forgot to resize before uploading. :(

01-18-2007, 06:23 PM
I guess someone forgot to resize before uploading.
It's small now. :D

Medula Oblongata
01-19-2007, 01:47 AM
Your primers aren't showing any flow. In the pistol, the hotter the round, the more flow you see. Some of my hotter loads have raised donut cratering, and on the reall hot ones, the primer will occaisonally be pierced. Your primers are still showing a nice dent without any signs of primer flow or unusually high pressure. This may be due to the powder itsself. I don't know. I'm not really familiar with Western Powders, having stopped buying it when they left the "Winchester/Western" label. No particular reason, I just liked the Winchester containers and logo's better.

Resize the brass and see if a new primer seats. If it does, I'd shoot it.

Your picture looked to me like the primer crimp was moved a little, but I wasn't able to see any actual 'stretching' of the pocket. The angle is off, and there is not enough detail. Perhaps you could get a little closer and use a deleniated instrument to show the difference in gap between the factory and your handloads.

For the record, I feel that HS-6, RamShot TrueBlue (the factory powder), and Vihtavouri 3N37 are the preferable powders for this cartrige. But like I said, thats my feelings on the subject.

Best of luck, and BE SAFE!

01-19-2007, 09:59 AM
Thanks Medula,

I took your suggestion and resized the brass and sure enough the primer pocket felt tight when I reprimed it. I use a handheld priming tool, so I can get a pretty good feel for the primer pocket condition. I just want to get a second opinion on the recoil / bolt speed observation. Even the below starting load of 6.5gr seemed much hotter than SS197 and I don't want to harm or batter my Five Seven or Ps90.

I have a local dealer that has HS6 in stock, I think I will give it a try this weekend.
I noticed that you have a load for the 46gr Win HP using True Blue, and was wondering if you have worked up any other loads using a different powder? I have not been able to find anyone who deals in Ramshot in this area and don't want to pay hazmat costs for shipping.

Thanks to all who have done R&D on reloading on this forum.


Medula Oblongata
01-19-2007, 10:34 AM
I have loaded everything with HS-6 and Viht 3N37.

46grn JHP I use 6.2 grns HS-6, 6.0 3N37
40grn VMax I use 6.5 HS-6 and 6.3 3N37
35grn VMax (I don't recommend using this bullet, too hard to work with) 6.8 HS-6 and 6.6 3N37

55grn FMJBT OR Spitzer I use 5.0 HS-6 and 4.6 3N37 (can be pushed higher or lower depending if target load or suppressor use)

Those are the main bullets I have experimented with and found success.

Feel free to ask if you have a more specific question.

01-19-2007, 08:09 PM
thanx for all the good tips on reloading this cal. Medula.
I am not looking into hotroding the round, just duplicating the ss197. Seems 6.5 gr of HS6 is the way to go( have a lot of it on hand already) for me anyway.
If I can get up to 12 reloads per case that would be awesome.
Medula, i think it is time to invest in a progressive press. ;)

Medula Oblongata
01-20-2007, 07:48 AM
Please consider the loads above as MAX loads and start lower / work up!!

And I think you are right, Chris, I need to save up my pennies for a lightly used Dillon 550 with 4 conversions and a custom 5.7x28mm shell plate :D

03-03-2007, 11:48 PM
any one else have dillon 550 just bought the dillon 550 just set it up for 9mm to learn the basics I think Ive found another time sucking money droping love. My local distributer is working on custom dies for the 5.7 he will let me know as soon as he has a working version will keep you posted.

03-20-2007, 02:49 PM
I just started loading aa#7 at 7.0 gr, with 40 v-max boat tail. No problems yet. Is there any new news on why they "strongly recommend" fb to bt especially in the 5-7 pistol?

03-20-2007, 03:10 PM
Read the posts above yours. Try #3 and #4.