An AR is going to be a pretty big handicap in a lot of ways. Wind, of course, is an issue, but a larger concern is that small, slow bullet makes spotting hits a lot harder on steel. The steel is usually so shot up that the only way the RO can call hits is sound, and if the plate move. Many times, a .223 just wont swing the plate. Not saying it can't be done, and definitely cant say it won't be fun....but it will be tough.
This may or may not be an issue. Top competitors are migrating toward 6mm from 6.5 to help reduce recoil since a lot of matches have sensors to detect hits. You don't necessarily have to "spot" them anymore.
Very few of the club level matches have target sensor setups, at least around here. 6mm has been a thing for a while, and a 105 or 115 at 3000fps will swing a plate a whole, whole bunch more than a 70gr .224. there are several guys playing with the 22x47 and 22 Creedmoor shooting 90+ bullets at 3000ish, and even they are having some issue with spotting shots.
But yes..if that's all you've got, I'd give it a shot. Its gonna be brutal just because it's not the tool for the job. It will, at least, be a learning experience.
