I have a Montgomery wards .308 win built on an fn mauser action that I bought a couple months ago. It was probably made in the 50s or 60s and I don't think the previous owner cleaned the barrel in those 50 years. I spent hours cleaning the barrel with hoppes and in bore paste. After taking it out to test the gun and my handloads I would get 3 or 4 all touching and then one or two opening the group up to an inch. I am on my highschools rifle team and am a much better shot than 1 inch at 50 yards benched. When I got home upon looking at the barrel more closely I saw lots if copper fouling. I do not have solvent to get rid of copper fouling yet but will try and get but how much do u think this copper fouling could be affecting my groups