AZMorgan:
OK, let's see. If .357sig is 14.29% more pressure than .40s&w (35,000 vs. 40,000 psi), and .400 CorBon is 31.82% more pressure than .45acp (29,000 vs. about 22,000 psi, IINM), that's an average (roughly) increase in pressure of 23.06% for a necked cartridge otherwise basically the same. If 45S pressure is low 30s (32,500 psi? - don't know), and if you apply the same percentage increase (obviously this is speculation), then the .40 Triton Super should be in the range of 39,995. Hmmm, almost exactly the same as .357sig and if so, then it's obviously not excessive pressure for a strong modern pistol.
This reminds me of a question I've had: If everyone is so concerned about kbs in .40 pistols, then shouldn't we all be even more concerned with kbs in 10mm (37,500) and .357sig (40,000). But you never hear of any kb warnings about these, do you? Aren't we talking about the same kinds of partially unsupported barrels, but with higher pressures? OK, maybe the 10mm brass is thicker than .40, but isn't the .357sig brass the same? If not - if .357sig brass is thicker, then wouldn't it be an unsafe practice to form .357sig brass from .40 cases, unless of course you're not loading full-house?
Of course, Weshoot's "Risky Business" attitude has its appeal, too.
[This message has been edited by Futo Inu (edited June 16, 1999).]