My choice for what you discribe would be a 7 TCU in a 14" tube. Mine is very accurate the only thing I've shot in it has been cast Boolit mild recoil and low in muzzle blast compaird to a 223 and loaded with a 120 Nosler BT should be able to harves deer out to 150 and maybe 200 with shot placement you would have to do your home work on that though.
Flip


One shot is all you need
Aim small miss small.