Free: Contests & Raffles.
I don't know that any of them are really 'friendly' to the shoulder... I had a Browning .270 that was a hell-bitch to shoot.As far as a recomended first big game caliber goes... my vote goes to none of the above. A .308 seems much easier on the shoulder to me... out to 300 yards it'll do pretty much anything the other "big 3" will do... ammo availability is excellent (and about the cheapest of the big game cals.)... and the rifles are a bit handier. Same could be said for the 7mm-08... except for the ammo availability, but there's still a ton of factory ammo available. I'd rather have a small gun I could shoot well... than a big gun I was scared of.
My take on the three:I like the .270, light, low recoil, lots of ammo options and flat shooting. If I only intended to hunt deer this would be the rifle for me. But, it seems a little small for bear and elk. Yes I know lots of people use it with great success on elk, but I'm a new hunter and not totally confident in my shot placement ability yet. I can hit paper targets fine, but have little field experience. -Maybe I should start with one and work up to a larger caliber if I feel I need it once I get more experienced?