I now have permanent hearing damage, and very slight constant tinnitus, and it's not a terrible condition but i sure wish i'd have worn hearing protection while hunting. I've found that if i keep ear muffs around my head, it's not really excessive movement to slide them down over my ears for the shot. Once they're on for a minute or so i don't even notice them tight above my ears really. I'll never shoot another round without them, that's for sure.
I like the 65 JLK Low Drag in my 9 twist AR .223 AI. I''m using the old DPMS VLD magazine, and it's a great system for coyotes out to around 500 yds. or so. This bullet @ 100 fps faster than the 75's keeps up with them for energy, a little better for velocity, and wind. I killed a 500, and 430 yd. coyote last season with this combination last year, and it was as effective as any other 22 i've used out to that range.