It can be done in a Ruger #1. It would be fun to watch you shoot it.
Got to hold one in .500A2. 600 grains, 2400 fps. The idea was it's a bear defense gun. You get one shot. It rips from end to end on the bear, and keeps going, leaving a huge hole. The recoil was around 150 ft-lbs. If you miss, at least you won't be awake while the bear eats you.
A .416 Rigby is 400 grains @ 2400 fps. I suspect in a 6-7 pound rifle, you would notice when you pulled the trigger.
Recoil Energy of 93 foot pounds, and Recoil Velocity of 30 fps.
I've shot guns like that, usually at elephants and cape buffalo.
The .416 Rigby is a pretty amazing round. Flat shooting, hits hard, and in a decent weight rifle recoil isn't as brutal as the next step up, 458 Lott.
Ross Seyfried settled on the .416 for Africa after trying, and designing near everything. It shoots very flat, so it works for plains game or the heavies.
I'd look up ammo prices before you buy.
I don't think this guy is really your 'friend'.