I have a cva hunter bolt mag today after cleaning I fired a primer through it to make sure no solvent was inbreech. When I shot the primer I felt a small sharp blast on my hand not painful but noticeable. I have never felt it before. This is we're I need one of of u guys that have one. I looked at the back of the bolt and there's a whole in it were the hex head slot is right in the center it doesn't looked machined. If somebody can look at there's and see if it has a whole in I would greatly appreciate it.