might be the scope, but im betting the barrel is in need of a good cleaning with solvent to rid the lands n groves of lead n copper fouling. I patch mine at least every 50rds and clean deep for metal fouling after each shooting event. Try butchs bore shine its good for cleaning out barrels...
Joined up awhile back just now posting. A buddy from work is always talking about things on here so figured id get on here more. Im former army and now do gunsmithing, reloading, and on o.ccation weapons safty n training