Geez, I think a .50 BMG with the same weight bullet is shoving at least as much if not more. One reason the bolt action .50's were sooooo popular. I thought the .460 Weatherby Magnum clocked around 165 ft lbs free recoil, but might be a memory loss. Thing is, that poor slob wasn't holding the gun properly.
My favorite set of pictures was of an English dandy-type gun collector who sold a .577 Nitro Express double with the condition that he get to fire it first. Picture one - he shoulders the gun. Picture two - He's recoiling waaaaay back. Picture three - he has blood trickling out of his right ear. Some fun, huh?
A friend had one of those Barret Light 50's. When someone asked what the heck for, there weren't any elephants or rhinos around, he replied "There's Peterbuilts and Kennilworths!" Used to take it up the Shenandoah Valley with his military type buddies and shoot fifty gallon drums of gas at night. Not a regular thing, but just for a lark. He made us some dandy pens with the old casings. Still have one around somewhere.
Just checked and the 50 BMG is usually a 709 grain bullet with about 200 grains powder at about 2900 fps. In a 13 pound gun, that's about 188 ft lbs. Not fun with a bolt action.