Just a question JE, would you say that over 200, like 500-1000+, errors also show up from shooter induced inconsistencies and environmental effects far greater than at 100-200 as well?
Case in point:
.280 AI as seen above @ 100 (.169") .162MOA
Same rifle, same load @ 921 (2.9") .255MOA (if my math is correct?)
Pretty much as accurate as I could hold with a 3-15x Premier in a sub-9# rifle, and was as consistent as I could be that day. To say I was happy would be an understatement. But, chasing that extra .1 is always something I am looking for.
How much do you think run out played in this? I cannot tell you what run out was, as I just grabbed 3 rounds from my hunting loads, which I don't check.