RE: 10mm or 45acp
Personally I don't like either one for deer, unless you're pretty close, and the deer aren't LARGE.
Why is semi-auto the choice?
But if I had to choose between the two I wouldgo with the .45. There's just so many more options both weapon and ammo wise.
If you're really stuck on the semi-autos, let's not leave out the Desert Eagle in .44 or .50!