Shaman,

I have first hand knowledge that the .223 will kill deer out here in west Texas! So will the .243, the .270 AND I am sorry to say, the deer out here will still be dead if shot in the right place with a 30-30.

As a side note, I have a father-in-law who tells a story of a West Virgina 8pt who he hit in the shoulder with a 20 gauge slug at 45 yards-knocked the deer down, deer got up and ran off...no blood, no hair and he recovered the slug-no signs of penetration on the bullet. He says later that particular ammo was re-called due to failure to perform, but MAYBE IT WAS THE DEER!!!

Hope this helps

Dave