I have a 300 wsm and it is a ballistic twin to 300 wm with factory ammo. The advantage, of the sort mag is 10 gr less powder and slightly less recoil. If you hand load I see and advantage to the long action mags in that you can shoot the heavier , higher BC bullets and not as limited to length...
I agree with most of what you are saying a larger heavier projectile is going to carry more energy and will also have more recoil. There comes a point (for most people including me) where the boom is so big that affect bullet placement. I can shoot my 300wby a lot better than the 416wby and my...