u/Civil_Response2616

I've only really started getting into longer range stuff, and it seems like folks here might be able to educate me-

I ran an experiment today shooting groups of 10 at 100 yards (not truly long range I know, it's what I had access to). CZ 457 Varmint, Arken EP5 5-25, Tac22, indoor range off a bench (bipod + rear bag). I dialed parallax once, then shots groups of 10 only varying magnification (5x-10x-15x-20x-25x, two times each).

The 5x groups were the worst (seems logical), but 15x/20x were consistently better that 25x (roughly ~1moa vs 1.5). Is this expected, and if so why?

• Does higher magnification amplify parallax error? (as in, same eye movement results in higher angular error)
• Is the parallax setting dependent on magnification? (should I adjust if I change magnification?)
• Some sort of weird visual feedback loop where seeing more wobble makes me less consistent?
• Insufficient sample size? I fully expect to suck at this point; maybe it'll be a wash in the end.