Quote:
Originally Posted by Scott.M
There is more force exerted with the 40 than say the 9mm because it has a greater head diameter. Also since most 40's are built on 9 frames, there is less of a safety margin built in.
F(force) = P (pressure) x A(area)
|
Earlier .40s had a short life due to banging on 9mm frames. I SUPPOSE since this was recognized they've beefed things up a bit, but the deal about 'just switching barrels' to convert some guns didn't work out well.