To answer your question about heavier bullets I would first ask if we are still speaking of cast bullets. If so I may investigate farther in the future as time allows. I have tried enough jacketed bullets at magnum speeds to know my arthritic shoulders won't tolerate much of that. 15 years ago I probably would be more curious about them but that ship has sailed for several reasons. I basically chambered this in 300H&H to not have to deal with 30/06. Just a personal deal that I expect few to understand. Since I retired I undertake many projects just for kicks and giggles and the challenge of doing projects for fun and doing it on a shoestring so to speak.