I purchased a new Savage BA110 in .338 Lapua Magnum a couple years ago and went through normal barrel break-in and started doing load workup using Lapua brass, Federal #215 primers, Retumbo and Hornady 285gn ELD Match bullets. The barrel now has 120 rounds through it according to my records. I was never able to get much better than 1.5-2 MOA at 300 yards so put it on the shelf and moved on until I had more time to work with it. Recently I have seen several posts and recommendations on the Teslong borescope so ordered one. Today I put the scope down the barrel and it caused me some concern. Beginning approximately a 1/2" from the beginning of the riflings are what looks to me like tool marks. These repeat approximately ever 1/4"-3/8" for about 2 inches before they are less pronounced. Initially I thought this must be due to improper cleaning but after looking at them further it seems like some of them only cut through the rifling and some do not touch the rifling but are only seen on the lands (hope this terminology is correct).
Has anyone seen anything like this before? Any idea what caused this? Could this be the cause of loss of accuracy? Thanks in advance for your insights.
Has anyone seen anything like this before? Any idea what caused this? Could this be the cause of loss of accuracy? Thanks in advance for your insights.