I’ll throw my two cents in. Like many I believe stock design is key. I’ve had several 30-06’ rifles that were uncomfortable as hell to shoot. One being a CLR and an old school M700 ADL that had a hard plastic butt plate. I have had a Ruger No. 1 in 45-70 that I loaded rather heavy and it never bothered me. I currently run a Ruger 77 build in 35 Whelen with a stout load (59.5 grains) of RL15 and 250’s. It wears a Hogue stock with a good pad. It’s a pleasure to shoot and bumps about the same as my 270. My 35 Whelen is my go to but, if I had to do a commercial off the shelf do everything from vermin to elk I’d do a 6.5 Creedmoor in a 700 Mountain SS. Why beat yourself up. Or I’d just run my 270 and never look back.
