pro's and con's for 300weatherby

[ghost stalker]

just found a winchester model 70xtr in 300wby for under 400$can and was wondering what ppl thought of the caliber.
i'm on the market for a real shoulder cannon for elk and big moose. my 280rem is not going to cut it so i want a bullet that is gonna do some damage. i love short a blood trail ya know!
i may be pushing the envelope on elk with 3,4 or even 450yd shots so kenetic energy and accuracy is a must. was tinkering with the ultra-mags, but they aren't overly available, i don't yet hav reloading gear and factory ammo carries a heafty price tag.

the fellas here alway have lots of opinions and i'm sure you'll want to talk up or down this caliber so thanks in advance.