Among rile loonies, the word “need” is an interesting concept. If comparing lethargic factory 06 loads to premium 7mag loads, the 7mag is a step up(I’ve chronographed a couple of different 06 factory loads that didn’t even break 2600fps with 180s). Is it necessary for typical elk hunting? Not really. I’d have every confidence in an 06 loaded to its potential with 165-200grain bullets. Personally, I’d lean towards 180. At 06 velocities, I wouldn’t feel compelled to shoot premium bullets (I‘d probably start with Hornady spire points). FWIW, 160 accubonds will do just fine in a 7mag on elk...been there done that. I do feel strongly about bringing back up rifles on hunts... Perhaps you’ll find a “need“. I’m also a fan of Tikkas. All of mine are shooters. Loaded to potential, those light guns may surprise you with their recoil.