Hey guys, thanks for the replys. I just bought some winchester caps and same deal, they just dont fit. only thing i can figure is they always fit that way and when they were a little fresher they went boom. strange though the second tin of cci's is much newer. Anyhow with those 10 of 12 needed to be hit twice to go off. i think what i will do is shave a little off the nipple a little at a time until i have a snug fit but they all fire. To answer some questions though both nipples were the same brand as before and everything checks out they are for no.11 caps and the caps are no.11's as well. absolutely baffling how they used to be so reliable now problems. one last question how far is too far to seat a nipple anyway should i polish enough off so the charge in the cap is on the nipple face??? ....Thanks Fellas