What does everyone think? I have kept them out of my S&W M-12 and I'm sure others have been careful of them, too. I recently sent some factory 135gr factory loads home with Larry Gibson from the Cast Boolit forum and he pressure tested them in a contender .357 barrel with a pressure trace.

The .38spl gave only 16,600psi which is below the 17,000psi of standard pressure loads.

The .357mag gave 23,800psi which is very low for .357 and is supposed to be for controllability.

I'm wondering if I could use the .38spl in my M-12 and not have to worry about cracking the frame under the barrel boss. Anyone got any input on this?

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dd884
JMHO-YMMV