Sorry guys... I've never even cared about this with my 5.56 but because I noticed some slight pressure signs (that you guys assured me were in normal range) I just want to be sure. I have two Grendels in my possession at the moment and they both do this. One is an AA 16" and the other an ER Shaw 18". When a round is chambered and then ejected both make superficial marks on the bullet (superficial meaning I cannot feel them)... Is this normal?
PS: both guns also make a VERY light mark on the primer from the firing pin when chambered... Is that also normal?