Put in ear plugs, then ear muffs, a weight lifter's glove on the right hand, a cushion under the right elbow (assming you're right handed) and then it's not too bad off the bench. I would shoot mine a lot more but I don't want to irritate my neighbors.
Shooting it off hand really isn't bad at all. It's definitely stiffer though than a 30/30, a 7mm/08 or a 454 Cassull.