You need 16 and 20 bore double guns to match that Ithaca.

I gotta ask.... a high point carbine? I almost bought one in .40 a few years ago when I was culling does in SC as a joke, just to see if I could kill a deer with one. I ended up using one of my bosses new toys instead.... a PS-90 (civilan with the longer barrel, but still a 5.7x28). Killed the deer... and wow are they loud. He bet me I couldn't do it... I honestly felt very strange carrying that suped up paintball gun to the treestand.