My T3 in 300WSM has a Limbsaver recoil pad and an Ahlman's muzzle brake. With hot loads and 180 gr bullets I can shoot it all day in a t-shirt. Before the upgrades I was done after 15 rounds.
Decent recoil pad and NO brake. 20 rounds is about enough. I'm less than 5' 10 and about 200. So I'm not huge. I consider myself able to handle recoil moderately well. Muzzle break should really tame it down. Bruce