WD242, I too have old shoulder injuries although I have not had surgery yet. I lived in constant pain until I finally quit shooting my bows. I also found that a quality recoil pad like a Packmayer Decelerator(my favorite) helped a lot. I have given up the 375H&H and larger bore guns also but still shoot 30 cal. It's amazing what I can kill with my 257 weatherby and a well placed 120gr. Nosler. The big bores do have a place in the hunting world, like Brownies in the alders, but for 90% of our hunting a 25 to 30cal rifle works fine if we can shoot it well. Guess I rambled a bit. But IMO a 180gr. bullet at 300 savage velocities in your 30/06 carbine with a premium recoil pad should work well for you. Any good loading manual should give you loads. Hope this helps, Byron