Though not a 'designated' one shot, my only rifle I utilize for current western hunting is a 45-70 for which, if you calculate the cycle time following the significant recoil and adjustment of rifle takes almost just as long as a single shot with rapid reloading skills.
I've read 5 pages of our back and forth opinion.......boils down to...when in public, say nothing, joke nothing, pre-plan your public presentations and stick to script (learn from our fading President). When in private....chose your tribe. If you are a public figure, corporate leader - every...
Yep.....different grains weight of powder and types of powders in each...offer differing velocities....also the way the bullet is placed in the casing (depth, etc)
Forgot to mention in my photo tour above that preferred ammo is a light Hornady factory 250 grain mono-metal....1 moa.....but limited to 200 yards for larger game as energy drops rapidly......Calif limits us to lead free/expanding....so can't be too picky when hunting in-state.
.....after all the professional advice you have received...if you are still grasping for something different...you can join some of us traditional hunters that stalk our prey like our fore fathers. For me I trust my 45-70 with a 2-8 scope approaching all shots taken within 200 yds. And at this...