Probally ought to keep my mouth shut but I wouldn't even recommend a 243 for deer. Sure they do a good job but then so will a 22LR. Anyone want to jump up and reccommend that? There are lots of cartridges that perform well beyond reasonable. This is one of those things where someone jumps up and tells us of all the deer they have killed with a 223 or even 243 but no one tells of the failures. I've owned several 243 and 223, I've even killed deer with both and they strike like lighting.....If,if,if,if ect, ect, ect.
Nosler hasn't helped much in my feelings, they make a .224 dia partition bullet. I'm not only sure it will work but also that a 50gr or heavier will work as well....If,if,if!
I think that to often we speak of things for the sake of discussion that is better left to private discussion among those that KNOW the "ifs".