Looks like every shell casing for my Kimber (2001 Custom II Target 5"), 1,000 rounds claimed through it (I bought it used), has a burned spot where it looks like some gasses escaped and flowed down the side of the shell when it was fired (factory 230gr FMJ). Probably all from the same place, can't tell how the shell was facing but marks look the same on all shells. Picture has been enhanced a bit to show the left side stain, it isn't quite as obvious as that in real life. No stain on other side of the shell. Anybody else see this before? Any ideas before I call Kimber about it? Thanks!