I am a medium to big bore fan, but in general I like what works. At age 15, my 223 rem claimed my first whitetail in the Adirondack mountains of northern N.Y. Later a model 99 in 300 sav. So too the .284 win,257 Rob AI, 25-06AI,35 Whelen, and the 45-70. Out of all these cartridges perhaps one would be considered a deer cartridge while the others would(minus the 223) be deer and...other,bigger stuff rounds. Now I know, thousands of elk have been harvested with the 257, let alone in the A.I. version...but that's not the direction I'm heading with this "question." Given all we have today in reguards to premimum style bullets, What are our "Deer Only" cartridges? I'm talking about a cartridge that could be shot by all legal hunters (say 14 years old and up...man or woman) and that would propel a ethically weighted and expanding bullet (except in the case for cast bullets) through a deer at the place you want it to go. I know this brings up the Ol' "I put a deer down with a pass through shot on a squirrel with my Daisy red rider B.B. gun..." and of course the story of "I shot him at 60 yards, broadside right through the heart 5 times, reloaded and shot him twice more, but there was no blood...only to find him a few days later half a mile away...I'll never use a "xxxcaliber" on deer again."