I'll be taking an old Savage US Government (Enfield No 4 Mk 1) to my local lgs to see what he can tell me about it. From what I have read, they were mostly chambered for the .303, but some were not, so that's what I want to find out. Anyway, if it is a .303, is it a good round? How useful/effective is it as a self defense round and even a hunting round? Why aren't more rifles using this caliber? Are these more expensive to buy than say, a .30'06 or a .308? Thoughts, opinions?