Puzzled About Sighting In Optima Elite

[hawkenman]

Yesterday I was sighting in my OE and using 120 grains of 777 and a 350 grain Hornady FPB bullet. I started at 25 yards and finally had the shots touching and going in the same hole. Pleased I went home and took the barrel off for a thorough cleaning ( I didn't touch the scope). Today I went back to the range to shoot 100 yards, out of 4 shots I didn't even hit the target or stand. Could taking the barrel off cause the scope to get that much out of aligement?

[Buckskins & Black Powder]

Never go from 25 yards  to 100 yards.

Go back to 25, recheck with 3 shots, move out to 50 yards, 3 shots, 75 yards, 3 shots.

I know that my shots when sighted 2" high @ 50 drift a good 2 or 3" to the right.

You are using a lot of powder so i am not quite sure how that bullet will act at 100 yards.

Just because they were in one hole at 25, dont mean you will get good groups @ 100.