Oct 29, 2014 #21 7mminatree Well-Known Member Joined Jan 12, 2012 Messages 2,083 Location Unicoi Tn. Sounds to me like you may have some rifling burrs causing some blow-by. This may also be why it seems to have a tight bore. I would load a sabot and then push it out and examine the rifling marks.
Sounds to me like you may have some rifling burrs causing some blow-by. This may also be why it seems to have a tight bore. I would load a sabot and then push it out and examine the rifling marks.