Can barrel heat change group size?
I was shooting my 500S&W Encore again at 50yards and was getting good groups. After about 20 to 24 shots it started going south on me. I stopped shooting and wiped the bore with one dry patch and the barrel looked clean. I then shot 3 shots into a 1.25" group with the next two groups going wild again. I was shooting fast and didn't let the barrel cool I just shot group after group at 50 yards. I was talking with a fellow boolite cast and he questioned the barrel heat and boolit size.
My load was 11.5 grains of Unique and a 450gr GC soft lead boolit lubed LeeAlox. Note there was no leading in the barrel after about 45 rounds but groups had gone wild.
Tim