If one lets the barrel cool a bit between strings, 50 rounds in a session would take many hours. I just got home from spending 2 hours in a wheat field in 75º beautiful weather, with two rifles, with a homemade barrel cooler, and I still only fired 33 rounds. That was pretty much as fast as I could get it done, without firing a string on a barrel that was more than "mildly warm" to the touch.
As for recoil tolerance, "50 rounds" is meaningless anyway. 1 painful shot is enough to throw off even someone like me, who is more recoil tolerant than anyone I know. I printed a 1.5 MOA group, shooting prone, with my buddies 7.5 lb, iron sighted Marlin Guide Gun, shooting 405 gr gas check cast bullets at 2000 fps. Probably the hardest group I've ever shot. I was able to concentrate my way through it, but heysoos chreesto, every trigger pull was a struggle.
IMO, if you want power and good groups, you must have a good muzzle brake. I have a 270 Win Marlin X7 unbraked (9 lbs outfitted) and a 300 WM Savage LRH braked (11 lbs outfitted), both with squishy modern recoil pads and synthetic stocks. The 270 kicks SUBSTANTIALLY harder.
I don't see the drawback to brakes, other than an extra 2" of rifle and more dust kickup. Complaining about the noise makes no sense. I NEVER shoot without ear pro, and can't imagine why anyone would, even in a hunting situation. And if that elk pops out so quick you can't ear up, the damage from braked/unbraked for one shot in a lifetime isn't that much different.