There are at least a couple of members that have chambered that round. Marv is one I believe and I know Richard (Stimpylu32) is getting one done. I do not know if he has it yet or not. You are not going to be able to go from a 243 to a .224 bore however. You will need to do a stub or do as the others and rechamber a 22 Hornet barrel. I believe the members mentioned above rechambered 22 Hornets. Since you already have a 219 Wasp, you know what you are getting into as far as case forming. Good Luck and Good Shooting