Yeah, not a good idea. A bullet setback would almost be guaranteed as the case would be very thin @ the mouth. With all the 40 around, why would anyone even think of this? If you have a bunch, trade it. I haven't bought 9mm or 40 brass in years, way too much of it around the ranges on the ground.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".
Last edited by fredj338; 02-08-2013 at 22:11..