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Old October 22, 1999, 08:36 AM   #1
Join Date: October 13, 1998
Location: Dillsburg, PA, U.S.A.
Posts: 76
My Dad reloads and has offered to reload for my .357 SIG. We already use Hornady 115 gr. XTPs for the 9mm. Will these work in the .357 SIG? Who makes a good set of dies? In the past, a lot of people had trouble with UMC factory ammo. Is this brass any good to reload with? Sorry for all the questions, but I would appreciate any feedback. Thanks.
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Old October 24, 1999, 01:37 AM   #2
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Join Date: November 19, 1998
Posts: 986
.357 SIG is actually .355, so your XTPs are okay.

I like the XTPs quite a bit in 9mm, as they are quite accurate and rated for impact velocities equal to the 100-yard shots I can make when not under pressure. Their top rated speed is 1500 fps, IIRC, so they should do just fine for defensive work in the .357 SIG.

Please let us know your results as they develop.
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Old October 25, 1999, 05:34 PM   #3
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Join Date: November 3, 1998
Location: CA
Posts: 465

I reload for the .357 Sig, so will pass along some of my observations. First, resizing die settings are critical for me with RCBS dies. There is a very fine line between not resizing enough so the round will chamber, versus collapsing the shoulder if you go too far. After I load some rounds, I use my pistol's barrel as a check gauge to make sure I'm sizing properly. Also, these are bottleneck cartridges, so have to be lubed.

You will also find that not all 9 mm (.355) bullets will work with the .357 Sig. What you need are bullets with a relatively long bearing surface. If they don't have the long bearing surface, you won't be able to get the short neck area to grip them properly at the relatively short OAL this round needs. Speaking of that, I found I also had to remove the expander ball with my dies, to make sure the case mouth had enough tension to hold bullets well. I just chamfer the case mouth slightly rather than open up with the expander.

This round is fairly high pressure, so I tend to stay with a slower powder. Many people recommend AA #9 or #7. I use #7 for moderate to near-max loads with good success. There is probably more I could add, but can't think of it right now. Good luck with your reloading.

Regards - AZFred

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