I have a true flight 1.9 twist 34in chambered 300 norma with a serious copper issue.
The barrel has 180 rounds through it and the copper is the full length of the barrel with naked bullet and about two thirds when using moly coated bullets.
I have used true flight barrels for years in my match barrels and never had this issue before they very rarely get copper at all.
Now I thought that the issue maybe the long bearing surface on the 230 berger hybrid I have run them from 2980fps to 3100fps same result.
I have polished the barrel 3 or 4 times no change I thought it maybe barrel lenght but im not so sure on that looking at info around on the 300 norma.
Im going to make up some lead plugs give it a serious lapping to see how that goes so any thoughts or input would be good this barrel takes about 3hrs to get copper out but still needs an abrassive to get the last copper remains out.
Cheers Trev.
The barrel has 180 rounds through it and the copper is the full length of the barrel with naked bullet and about two thirds when using moly coated bullets.
I have used true flight barrels for years in my match barrels and never had this issue before they very rarely get copper at all.
Now I thought that the issue maybe the long bearing surface on the 230 berger hybrid I have run them from 2980fps to 3100fps same result.
I have polished the barrel 3 or 4 times no change I thought it maybe barrel lenght but im not so sure on that looking at info around on the 300 norma.
Im going to make up some lead plugs give it a serious lapping to see how that goes so any thoughts or input would be good this barrel takes about 3hrs to get copper out but still needs an abrassive to get the last copper remains out.
Cheers Trev.