All went well, until one of the guys loaded my USP 40S&W with 9mm. One round shot through it. It didn't automatically eject the spent shell, but did when I stepped in to see what was wrong and manually cycled and ejected. Question is, how bad did having a 9mm shot through my 40S&W barrel on my USP Full size mess up the barrel? Is it safe to shoot again? The ammo was S&B target lead ammunition.