I have never had any firearm that copper fouled bad until now. My 110 FLP 25/06 is a copper mine! I broke the barrel in properly,and have shot close to 500 rds out of it.
It shoots 100gr bullets great-sub moa at 100yrds,but heavier bullets are so-so,usually 1.5-2 moa.

I have hand lapped the barrel,and it still takes hours to clean this thing,and it still has copper in the barrel.Nothing will take the copper completely out.
I was going to send it back to Savage,but figured if they put another barrel on it,I would have the same problem since it would have probably been machined with the same tooling.

Any Idea's! My 308 and 300WM have always been great shooters and don't copper foul much at all.
I'm open to suggestions.