My 375 Weatherby shooting 300gr pills at 2890fps is around 70ft/lbs recoil, my 416 Rigby with 410gr Woodleigh SN is just over 60ft/lbs with it doing 2530fps. I have never had an issue shooting big bores, my double in 500 Nitro is 14.5 lbs and a pussycat to shoot.
The 505 is the most brutal rifle I have ever shot due to its lightweight, it smashed your trigger hand just as hard as your shoulder! Have a video of a guy shooting it and the guys hat, glasses and earmuffs are blown off his head and he had a dead arm for 3 hours, felt really bad about that but he didn't pull the gun in tight, like limp wristing a handgun.
Cheers.