I think a great deal of these discussions are primarily based on the
"oh yeah! theres no doubt my rifles better than yours... mentality"
the problem is rarely the rifle or cartridge used,
its finding the game, and getting a decent shot.
Ive seen enough elk and mule deer killed with everything from a 44-mag hand gun to a 458 winchester
to realize its the hunters ability to precisely place a shot in the vitals,
his knowledge of the games anatomy and experience too select and use a projectile,
with enough mass and structural integrity to penetrate adequately, that are the keys
almost all the center fire rifles will get the job done, at reasonable ranges and conditions.
most people can,t see the advantages of using a magnum,
simply because they hunt deer or similar game, at ranges under 300 yards,
which are rather easily killed, and few hunters can consistently hit accurately ,much further.
personally Ive yet to feel my 340 wby or 375 H&H put me at any disadvantage.
Ive also used a 257 roberts, and 358 win,and 450 marlin BLR and 44 mag marlin carbine
Ive used a 6mm rem, browning 78 single shot, and a ruger #1 in 257 wby....they all worked.
carry what your comfortable with and practice until you can hit a coke can at 100 yards off hand and youll do fine!