At some distance, a 223 Rem is nothing more than a 22 Hornet. And at some distance, the 22 Hornet is less powerful than a 22 LR.
So, just get close with your 22 LR. Probably would use a high-velocity copper-plated solid bullet ( not HP) to ensure deep penetration to the vitals. It goes without saying, but, shot placement is everything.
In that regard, the 223 may be Overkill. You can't kill them deader than dead. Don't get me going on the 223 AI or 6.5 Creedmore.
Maybe you guide can use them for back-up rifles.
