The bigger guns take a great deal of concentration and practice to shoot well! My old Jeffery double will shoot very well if you can keep your head in the game.
Matt, you bet they do, thought has always been if a man is going to show up with a big gun he best know how to run it, same/same with my '74 Sharps rifles, black powder with paper patch bullets, or even S Hawken pattern rifle in 58 cal with Holy Black and round balls, after shooting completely through every deer or wild pig I've hit with any of them I no longer get strange looks at camp from my BIL's friends I didn;t know at the time.
One guy said after I hit an old barren in the withers grey faced doe, "Sir, I didn't want to say anything, but I didn't even think that rifle would go off when I saw you this morning" I said, that rifle only looks 150 years old young buck.
AZDAVE is correct, torque is very real, it comes from 750grs slamming into the rifling, it will turn the rifle in your hands, I grab the barrels, not the forearm, double rifles recoil up out and over left and right with both barrels, just hang on and let the rifle do what it was designed to do, if one tried to shoot a 577 Nitro holding the forearm like you would a regular bolt action rifle it could fly over your head backwards and knock the beer outta the hand of the man 20 feet behind you sitting a in a lawn chair ; ]
Red Leg also has a handle on it, for every action there is an equal and opposite reaction, also, Momentum, it's the easiest of the Newton/Physics scales to understand, it is simply mass in motion, I believe in it, it is a very real thing.
My 577 weighed 14.5lbs when I got it, carried it 100 miles in Tanzania, came home and pulled that 1LB mercury recoil reducer from the buttstock and gave it to my Gunsmith, these rifles are carried much more than they are fired, making the first shot count requires much less shooting, no rodeos, as it should be.