RE: .303 enfield for deer
I have an Enfield .303 from the Canadian Army. I can tell you that without any doubt this gun will easily take any medium sized game and as others have stated it has been used for animals as large as cape buffalo. I suggest that you go pull a box of ammo and compare it to the 30-06. It is quite similar. The only drawback on mine is that it has the Army peep sight. Great for about out to 100 yards. A sporterized version might well be one of the best guns you will ever shoot!