Keep in mind that there were no special metals used in the 940s, including the 940PC and that was chambered for the 356TSW and it pushed pressures upwards of 44000psi. The 9mm runs 30000-35000psi, in the same range as the .357mag, the cylinder can contain the pressure no problem. These conversions have been being done for years and I haven't seen where anyone has had one grenade yet. Certainly the aluminum frames aren't as tough as steel or scandium but they seem to be holding up to standard pressure 9mm just fine.

Azdover mentioned that I've qualified with mine, that was 100rds in about 35 minutes with no issues. I've shot 9mm, 9mm +P+, .38 Super, and 9x23 Winchester through my gun with no ill effects. These guns are rugged. His plan to carry the 937 and practice with 940 is a great idea, both of those guns should last him forever.

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