[KodeFore]

I am thinking it looks too short, but would like to know for sure?

[Thernlund]

No. The .40 case isn't designed for the .357 SIG pressure. They are different cases entirely.


-T.

[Thernlund]

Double post deleted

[ReloaderFred]

Besides the length issue (they are too short to be properly necked to 357 Sig), there is also the issue of internal differences and the higher pressure the 357 Sig is loaded to. The .40 S&W case isn't designed to take the pressure the 357 Sig operates at.

The neck on the 357 Sig is already pretty short and provides just enough neck tension to hold the bullet during cycling. The shorter neck would be problematic in preventing bullet setback, and thereby increasing pressure even more.

There is plenty of 357 Sig once fired brass available these days, so it's not necessary to coble up some to shoot. I bought several thousand from Midway and other places. I've got about 12,000 rounds of 357 Sig brass on hand, both loaded and ready to load.

Hope this helps.

Fred

[KodeFore]

Thanks for the information. Looks like I will stick to factory loads for now. I recently converted my G22 to a 357Sig to meet a duty requirement while my prefered Gun a GP100, is undergoing an action job at the shop. This will be put into the "Maybe one of these if I see the dies for sale cheap I might try it list" So far as I can tell, this round is wimpier than a true .357 Mag.

[SilentArmy]

When the .357 sig first came out, my buddies and I formed our brass from .40 SW brass. They are a little short when it comes to case length but other than that it worked fine and thousands of rounds loaded and fired this way! We had some headspace issues where the shoulder of the case was not set back enough so we milled a little off the top of a shellholder to get the case to go deeper into the die and solved that problem. .357 brass is now pretty common so not a big deal to find. I scrap hundreds of pcs per month as I don't have many brass customers ask for it. No pressure signs on the formed brass and no issues with neck tension if the round is properly crimped.

[mscott]

Hmmmmm.....If you do a little searching on Brianenos.con it seems that quite a few guys stick .40 brass in the press and get .357sig out the other side.

[Walkalong]

It is one of those things that you can make work, but there will be limitations with the brass. Like Reloader Fred said, there is plenty of .357 Sig brass available, and that is the best option.