I call shooting hard kickers "The Zen of Shooting Hard Kicking Rifles". It is a challenge to do it and not flinch your arms off or jerk your jaw off of the stock. I shoot a hot loaded Ruger No 1 in 45/70. (I load it light too sometimes.)
Some rules.
1. Don't shoot the rifle off of a bench rest.
2. Wear a shooting pad. I usually forget mine. I just accept the bruise. Makes my wife cringe when she sees it the next morning. It'll be colorful.
3. Wear good hear protection (plugs and muffs)
4. Adjust your spot weld so that you don't crawl up too close to the end of the receiver.
5. Hold your non-shooting hand pretty far out front on the forearm.
6. Hold on tight, but not so tight that the gun wiggles. You do want to hit what you are shooting at.
7. Concentrate! Set up to allow the gun to kick and rock you back. If you want to shoot from the bench BEWARE. I usually shoot hard kickers off hand, sometimes leaning against a post.
8. Allow the gun to rock you back. YOU are the recoil system. NEVER shoot prone. Sitting is okay. Kinda
9. Lastly; don't take too many shots. After you shoot your boomer shoot something else that has a lighter recoil so that your subconsious can forget the punishment of the heavy rifle.
Those are my personal rules for shooting guns that punish. You may have others. Oh, I never scope a heavy rifle, but lots of guys do. NEVER crawl up close to the scope of a hard kicking rifle. It is hard to see through the blood, and you'll likely have to tighten up the mounting screws. Use locktight and don't strip the threads when you re-tighten that scope.
Just dab that half moon cut between your eye brows with your shirt sleeve. It'll be pretty deep. Leave it be, it'll heal just fine and you'll probably not have a very noticeable scar. If, however; you do get one, well; be proud. You won't be the first.
Remember you won't feel the recoil when you are hunting. What you want to do is to get somewhat used to your rifle and not develope a bad flinch. I find that 375's don't bother me much, but a 300 Win Mag does. Maybe it's the stock difference between the two rifles that I shot. A 460 Weatherby Mag is a killer! I enjoy the recoil of a 30-06 and .270. Just enough to make one aware that one is shooting a powerful rifle, but not punishing. A .257 Roberts is one of the most pleasant hunting rifles that I have ever shot. I love mine and frankly it's enough for most of my kind of hunting.