Help me with a new caliber on a build (hunting incorporated)

[Canhunter35]

Hot rod 22cal, 22-250ai or 22creed
Or go big, 338 something, but I would shoot for 16lbs all in on the rifle, bring the big boom stick lol

 

[WildRose]

Man that would be a screamer! Should drop an elk with a big thump! Lol

There's already a 300 Lapua Magnum, it just never went anywhere commercially.