Whats your longest rimfire kill?

Even though we're resurrecting a zombie I'll play.....
22lr- furthest confirmed kill 166 on a woodchuck. I've hit a couple crows (blood and feathers) at 275-280 but didn't anchor them.

17hmr- 275 yards on a gray squirrel. Also killed a woodchuck at 248 with it. Killed multiple crows and woodchucks in excess of 200 but those 2 were my furthest
 
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