the 3030, wont reliably expand a softpoint beyond 150m, Put a 60 gr Partition in the 223 and it will stop deer just as reliably as the 30-30 (ie, not all that well beyond 100m) the 60 gr can attain 3000 fps in a 20" barrel, loaded in a 5.56 chamber. 1200 ft lbs and none of it gets wasted on overpenetration, which is the case with most 30-30 hits. the wound channels look so close to the same that you'd never know which was which. You cant shoot them in the ass and expect to reach the vitals, but only an a-hole would do such a thing anyway.
I load a Speer 125g flat HP for my 30-30 that gives amazing expansion. I’ve taken deer and hogs with it. Rarely a step was taken.