Hi Guys, got a target action LRVP in .223 that I got a Krieger 1:7 twist 30" barrel put in (nutless) that I use for F-Class & have noticed marks on the bolt face from opening & closing the bolt that have come from the rear of the barrel, question I have is this normal or could it be causing a problem??? I do have funny things happening, but there are many areas to check (including myself) before pointing the finger at the cause of strange flyers. THANKS!! Geoff