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isn't 17hmr the go-to rimfire ammo for long distance shooting?
Maybe a bit better, but with that ammo you are now up to 125 yds, AND $12.00/box. I'd say worse in the wind, but don't know the B/C.
Realistically, heavier would be better. Maybe even 42 gr Gemtech, but slow, like 1050 fps slow! Can't even imagine the drop @ 500.