Originally Posted by NZP
generally, how many shots should you have to fire befor the barrel stops copper fouling bad?
ive had 2 liljas, a 6mm and a 7mm barrel and im not giving them any points for lack of fouling, the 7mm barrel has had about 250rounds through it, actually i think it fouls worse with A-maxs than SMKS, and the 6mm is brand new at 5 shots.. just firing a shot and cleaning it right out in my 6mmbarrel till it stops fouling bad.
when i hear people say the only had to fire 3 or 4 shots and there barrels stopped fouling, do they actually mean that there is basically no copper to remove? Im cleaning with eliminator.
the 7mm is a 280ackly and is plenty accurate as a LR hunting rifle as it shoots between 1-1.5" groups at 300yards
You're probably going to get a lot of opinions on this, but here is my limited experience.
I recently broke in a new Sako Finnlight 300 WSM. I cleaned after every shot until evidence of copper fouling was gone. After the 13th shot I saw no more copper fouling. Then I started cleaning after each set of 3 while trying to find a good load. Still only a slight trace of copper. Then I went to 18 rounds and got a medium blue patch after a long soak with Wipeout. The next patch after another soaking was clear.
Unfortunately the rifle isn't shooting well and will be replaced, but the break in did seem to significantly cut back the copper fouling to almost nil.
Some will recommend using a bore guide while cleaning and breaking in.