I always wondered what would happen if you zeroed a 16 inch upper with A2 sites on 62grn, and then shot 55 gr in it. Would it make a big difference??
I used the following ammmo to zero my 16 inch AR uppper, at 50 yrd battle zero.
IMI green tip.
Ok, then I went to the 100 yrd range and started using AE 55's and South African 55 gn,
Each target was a outers 100 yr rifle target. The orange ones.
Guess what?? Other than impressing myself with my excellent shooting ability.... :)
Not much other than keeping them in the 7,8,9 X rings. All were on top of the targets in those rings. One or two on the bottom. I shot about 80 rounds today.
Only reason I bring this up, is somewhere, someone would say it would make a difference. Up to 100 yrds, not really. If you aimed for center mass, your going to get center mass.
I did use a bench and a couple of sand bags.
Does that help anyone?
I bet at 200+ yards you would start to see a difference getting more drastic the farther out.
I had my 16" setup and zeroed at 100yd with my acog shooting 55gr SA. the 64gr Winchester I hunted with was so close it was the same