I have a older SW40V that I noticed that the brass was a little bulged in the middle of the cartridge after firing. Also that unfired cartridges are a little loose in the chamber. I measured the diameter of the chamber and it was .430. Does anyone know what factory specifications are? Do I need to replace the barrel.

I don't know what the "spec's" are but I used my dial gauge calibers on mine and a Glock 23 stock barrel and a lone wolfe after market barrel (figured if it was a glock copy they might have matched their spec's) all 3 were with .001 and were nominally at .423 @ just before where the case head spaces hopes this at least helps

I just measured my SW40VE and the chamber mouth measured .430" and steadily tapered to .425" at the rifling.

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My 3-month old SD40VE has a chamber opening of .428" diameter.

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Thanks for the quick replies. After reviewing the posts I am going to keep using the handgun and keep reloading.