Factory ammo?... 50 gr in the 'reasonably accessible' category. 62 gr in the 'specialty, rare, and expensive' category. (Aguila, I think it was?...)
Outside of factory ammo, I've personally fired 52 gr Speer HPs, 53 gr Barnes TSX-FBs, and 55 gr FMJs on the 'heavy' end. I know of a few people that launched 77 gr SMKs.
But seating bullets into a charged case, with the primer, itself, taking all of the seating force, is a sketchy process. I gave up my own experimentation after I had one pop in the seating die.
My personal preference is for 45 gr bullets (ArmsCor in particular). It's a nice, happy medium for how I use my rifle and what my rifle likes.
Though, I do occasionally run some of the Winchester Supreme 30 gr and/or 34 gr HPs for ground squirrel eradication. Those projectiles are explosive and brutal when they connect.