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Originally Posted by dahermit
May experience? Has it been happening?
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Let me make it clear that by heavier, I meant heavier than the titanium gun, not the heavy end of the revolver weight spectrum.
I don't think I've seen jacketed bullets back up in my guns, but they have a pretty good friction grip with the brass, so they aren't relying just on the crimp. Lubricated lead, though? I've had those back up in my 3" Charter Bulldog before. It was a 2400 load warm for the gun, and I recall my palm stinging a bit. But, yes, they backed up. Needed more crimp.
I'll suggest a rule of thumb: If you can push a seated bullet deeper into the case with your thumb before applying the crimp and the load is fairly stout and the gun not very heavy, then there's a good chance you need a firm crimp.
At the other end of the spectrum, I've shot lots of target wadcutters in .38 Special and .357 cases with nothing but a taper crimp and had no problem. The guns were not flyweights, though. I was never enamored of the snubbies.