I went to the range today and my 12F was not at it's best, I have not changed anything, reloads are the same and temp was a little cooler wind was 5mph out of the north almost the same as last week. I clean the barrel differant last week, I used CR10 and pushed patches until it was clean. Last thing I pushed patch of oil through the barrel. I shot 3-4 fouling shots and then things would not settle down. at 50 yards things looked great but at 100 yards the group was about 1''1/2 where last week you could put 3 shots in a dime???
I don't know what wrong it is driving me crazy...