.357 Sig

[sundog]

I did a search on here and came up with nothing. So, what do we collectively know about loading this cartridge with boolits?

I am going to help a friend who recently acquired one and has no ammo.

I have Ly 121 gr TC, RCBS 147 gr TC, a couple flavors of Ly and RCBS 156 SWCGC.

I have AA# 2,5,7,and 9/820; RD, GD, Unique, Herco; and prolly a few others.

I have a set of Lee dies that I will set up in a turret press. We'll start with some new Rem case.

[sundog]

Four hours and no response. Not surprising considering the search turned up nothing.

Anyone?

[davidheart]

I would imagine (never loaded cast 357sig) you wouldn't be able to realize the full potential of the sig in cast form. Maybe with a gas check?

Even trying to load 9mm cast with a fast powder leads my barrel pretty bad. Softer loads give me no issues though.

Edit: I stand corrected - http://castboolits.gunloads.com/showthread.php?82844-357-sig

[marshall623]

An older gentleman I know loads boolits for it . Been a few years since I talked to him as far a loads I have no idea , but I do remember him saying it took some tinkering to get them to feed reliably

[bobthenailer]

One problem that i see is the short neck of the 357 sigs case. getting the correct bullet fit to the case neck length might be a problem ? it seems to me someone on this fourm had one of the custom mould makers make him a mould designed around the 357 sig .

[TXGunNut]

Haven't had a 357 Sig since I started casting boolits but it required a short truncated cone bullet and it wasn't easy to load for. I generally dropped in my .40 S&W barrel for practice.

[sundog]

Lo and behold. I found an unused Ranchdog TLC357-135-TC in with my moulds. So I fired up the pot last week and made some. They are now sitting on a cookie sheet, checked, run thru a Lee .358 push through die, and once dipped (45/45/10). They will get a redip today or tomorrow. Dies and brass arrived yesterday, so after the crappy wx this week we'll give this thing a try. Also have some 115 XTP and some Nosler 124 HP. Ought to find something that will work, real boolits preferred.

[xringshutr]

I've posted on this topic a few times here. 358-125RF (new version), sized .358, loaded with 9.2 gr of AA #7 works great in both of my 357 Sigs. Bullet is seated with a fingernail width of the bearing surface exposed above the case mouth. One is a G31 (Glock) and the other is a Sig. The load shoots great and feeds great. Try it out, I think you will be pleased.

[oger]

Guess my post got lost somewhere. I use a Lyman 356637 at 153gr with 7gr of AA-5 in every 357 Sig I own. It works great in everything from a 226 Sig to a Glock 33.

[dkf]

The Accurate 35-147S and 35-125S are designs especially for .357sig. I have the 35-147S myself and use it for .357sig, though it can be used for other calibers as well.

I would use the AA#5 or AA #7. The 115gr XTP and 124gr Nosler both will work very well in .357sig. The .357sig needs a bullet with a shorter nose and extra straight real estate above the lube groove for the case neck.

[abqcaster]

I've done just that. Here's my writeup. http://castboolits.gunloads.com/showthread.php?179234-Success-with-the-357-sig

[McFred]

For a plinker I've used a 158RNFP (162gr actual), 12 brinell, Ø.358" 1.155" OAL over 7.1gr of surplus WC820F (fast lot) that burns about like AA#7, using a CCI sp primer. Feeds fine from either 40 or 357sig mags in a G31. Goes 910fps with stdv of 10fps. I've got a G35 with a barsto 357sig barrel and the neck/throat won't allow a .358" bullet, but the factory G31 is loose enough. There's room to push it I just never tried. The 158RNFP has lots of shank for the neck to grip with little if any setback.

I've also found that there's a wide variation in brass weight. So a hot load in light brass (more case capacity) will likely be too hot in heavier brass (less case capacity) with a big bullet jammed way in the case.

Have fun.

[Blammer]

when I loaded some up it was very finicky as to bullet diameter and seating depth and of course nose length.
It was an ugly experiment and I decided I'd just use jacketed from now on in that cartridge.

[oger]

Yes it will drive you crazy until you get it right. If you like to spend too much time tinkering with things give it a try otherwise just use Berrys 124gr FP had 0 problems with them.