Okay. I am bringing this thread back because the problem persists.
Yesterday, I revised my sighting-in technique to accord with the comments made above, and there was an improvement, but not to the extent that I wished for.
After sighting at 50 yards with center hold (X ring, SR-C target has a 3” X, group was 1.5”), I shot at 100 yards and 200 yards.
At 100 yards, group was 2” and the declared center of group was 4” above POA.
At 200 yards, group was 5” (with 1 flyer) and the declared center of group was 8” above POA.
All of the above were fired from a 16” barrel (Wilson) using the small aperture of an A2 sight.
Please contrast this with a similar exercise fired from a different upper (20” Wilson DCM/CMP profile) with X rings (1” group) at 50 yards and 3.5” high at 200 yards. Because this is a target upper, I used a 6 O’clock hold.
Ammo was the same, from the same lot. 55 grain American Eagle (Federal) FMJBT.
Any help?