I'm in the same boat regarding a fused neck. Probably need another , but getting by on injections. I have a 338 RUM that's about 9 lbs. I've switched to 180 grain Accubonds for practice (did shoot an antelope with them) and that makes the next day more peaceful. The stock on mine is an original pattern Winchester model 70 Mcmillan, all that was available in synthetic many years ago, and I really need to change it, The Mcmillan Lazzeroni thumbhole is on the to do list see if i can't put a little more recoil into a straighter line, and take up a bit in my right hand, Then likely a heavier scope. Bullet weight, rifle weight, stock fit and design, and I think it's doable. You're close where do you shoot?