that's just how they are Tassie
l have never put a bore scope down them before
they both clean very easily but the second one l shot the tubbs through had got pretty bad before l shot the Tubbs through it
usually taking a few days to clean with scrubbing and soaking after 3-5 shots, it lost precision after that so l could not do any testing
the barrel IMO was knackered and needed replacing before trying the Tubbs
what you need to do is think whether its worth the risk, l took the risk because it was no good as it was
yours is shooting good but fowling
l would have to think about it if it was a shooter but having a look with the teslong l cannot see any damage from using it
l know the throat did not move at all
l do not like barrel that fowl even if they shoot and in the past have usually just replaced them with a decent hand lapped match barrel
something to think about anyway
“If you do not read the newspapers you are uninformed. If you do read the newspapers you are misinformed”. Mark Twain