I have a couple 357 Sigs, and I have tried Power Pistol and LONGSHOT with 124 gr bullets.
They do not get much power before the Starline brass primer pocket goes oblong and and primer falls out. I tried various other brass brands, but the 357 Sig is just not a performer for me like 9x23 or 40 S&W.
And I shoul say that my trouble starts less than a grain above some of the loads posted above.
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