reloading BULLET help with .357sig

Montana Gold 125 grain 357 sig bullets.
https://secure3.mooseweb.com/montanagoldbullet.com/pricelist.tpl
https://secure3.mooseweb.com/montanagoldbullet.com/images/320x200/357SIG-FMJ-125.jpg

Speer:
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=306264

Most of the Hornady XTP 9mm bullets should work because of their more TC shape.

I think where you will get in trouble is with conventional shaped 9mm RN-FMJ. The ogive goes back so far the SIG case neck misses it at normal seating length.

Berry makes a few TC shape bullets that would probably work, except they say they have a 1,200 FPS velocity limit.

I think if you want .357 SIG performance, you will need to use conventional jacketed bullets.

rcmodel

As rcmodel suggested, there are certain bullets that work and some that won't. Stay away from any 9mm bullet in NATO profile, due to the long ogive.

The Speed Gold Dot 357 Sig bullet is an excellent one, as are the 115 and 124 grain Hornady XTP bullets. In the Berry's, I use the 115 grain RNFP in my Witness 357 Sigs, since I get better accuracy with that particular bullet in those guns. In my Springfield XD 357 Sig, I use the Berry's 124 grain RNFP and get excellent accuracy. I use Accurate Arms recommended data for 115 and 124 grain bullets and AA #9 for all my 357 Sig loads, both jacketed and plated.

Don't use the recommended Power Pistol loads that are at the top end in some manuals with the Berry's bullets or you'll get severe tumbling, but with AA #9, I get excellent accuracy and performance. This powder fills up the case and prevents bullet setback, which can cause some serious problems with this particular caliber. It's already a high pressure pistol round and you don't want to raise it any higher.

I've loaded around 13,000 rounds of 357 Sig, with about 10,000 of them using Berry's bullets.

Once you start loading this caliber, if you have any questions, feel free to ask and we'll walk you through it.

Hope this helps.

Fred

FYI:

If you are using 1x fired cases, it helps to pre-size the .357 SIG cases in a .40S&W carbide die to resize the outside without needing lube. Then you just "necksize" the .357 Sig die and you're set.

Zero makes a 125 grain bullet specifically for the 357Sig for $80 1K shipped.
They're just a good as Montana Golds and less expensive.
Plated Berrys are $78 so you might as well go with Zero's full metal jacket.
(When Berrrys initiated their ridiculous Lead Surcharge my business went elsewhere).

A year ago Lead was $1.80 a pound, today it's 73¢.
Berry's surcharge is $1.30 lb. go figure...

Dillon's carbide 357 sizer is a waste of money and doesn't eliminate lubing.
+1 on sizing with a 40S&W first. A Wilson case gage is highly recommended.

I've loaded thousands of rounds of .357sig with Berry's 124gr TC/FP 9mm bullet. I have pushed them faster than 1200fps with no accuracy/tumbling/other issues. Even with a max load of AA#9 (13.0gr) pushing one, the accuracy was just fine. I didn't chrono that particular batch, but they should've been going at least 1320-1350, based on the load manual.

AA#9 is blasty but fills the case nicely, and many like it a lot.
Universal Clays doesn't fill up the case as much, a good mid load with less muzzle flash.
I have used Power Pistol behind Gold Dot JHPs in .357sig, but not behind those Berry's, so I can't comment on that particular combo, but it worked fine behind those Gold Dots.
So while Berry's recommends a ceiling of 1200fps, I didn't have any problems going faster. Work up to it, every gun/bullet combo is going to behave a little differently. I should also warn you that with Universal Clays, at minimum loads, the gun wouldn't cycle reliably or lock back at the last shot.