Hey Guys...New to the forum and the 6.8 spc. Got a Question, I have a Bushmaster 6.8 spc upper with 1-11 twist 16" barrel CAR length that i'm going to hunt whitetails with. I've just started shoot today with Hornady bthp 110 grain and some Hornady 110 grain V-Max. The both grouped great but the bthp cases have a dent in the brass. Anyone tell me why. the VMax brass is fine just the bthp. Thanks Great Forum....