just try to fill in blanks and offer full perspectives, I do ask questions as well, I was serious about why not the near zero of the mpbr, or 25 or 50? so if anyone wants to chime in on why not then I'm curious to learn still as well, I tend to study, data mine, more numbers and scenarios than most and run more ballistics scenarios at more elevation/temp ranges than most to look for simplest ways with hunting as primary goals and I did this whole zero exercise exhaustively a long azz time ago so trying to see if the other ways to skin the cat that always come along can show me I missed something...
I've also had some fast rigs that I zero'd at 250, never zero'd anything further, we shoot too many coyotes so need to stay in a pretty small sub 6" mpbr window. One was a 204 ruger dedicated coyote rig that dialled up for the hangers and the other a dedicated big game only rig. The multi-purpose do all predator/big game rigs get 200 even though chosen mpbr zero's may be 210-235 yards...200 for simplicity and close to most big game cartridges mpbr zero for easy to remember and also for looking at speed dial turrets as starting from an even round number.
I'm still finding the 100 yard unconvincing as the better option over 200 (for hunting) but I'm trying to understand the logic...really I am. I'd rather check my zero in the field at 200, if you can find 100 you can find 200. We also have a personal typical real world field accuracy (me about 3/4 moa for 3 shots) I'd worry I'd miss seeing a 1/4 or 1/2 minute out at 100 and think I'm good to go. Brought a collapsable gong and some white spray paint for spring bear hunt and everyone shot at camp at 200 on steel before the hunt to make sure. Luckily everyone in camp also zero'd at 200 so it was an easy 1 step process lol, and everyone got their bear, the zero check just a formality and confidence builder.