I was using a heavy sidelock. That will help with recoil. The GPH you mentioned will ne lighter on recoil than the Deer Stalker, but you have to carry the weight for the whole hunt too. Maybe the recoil would be easier. You can wear a shoulder recoil pad. The old style curved steel butt plates are not kind on recoil, but do support the gun better for offhand shots. If it doesn't bother you. You could grind the stock flat and install a recoil pad. (gulp!)

Also, real black powder has the softest recoil. More of a push than a sharp punch. T7 has a sharper recoil than Pyrodex. AAP has a softer recoil, but I don't feel it's very consistent in fps which hurts accuracy.

So, your rifle, powder and bullet choice will determine the recoil. Those big lead conicals will wake you up, but you only feel it for a little while.