If you can get Broz talking long enough
He'll tell you zero @ 100. He as done 100/200/300 yd zeros and is heading for 100 yds.
After he told me that, I spent some mind time and it makes sense. !00 yds is the most convenient distance especially when checking zero @ remote locations.
Having said that, I'm sticking w/200 yds for my LR as all zero checks will more than likely be done at my backyard range. For the ELR rifle it'll be 300 yd zero to minimize clicks and to compensate for lack of a zero stop.
For this old man, a zero stop may well be a must. Came back from Townsend and sent 2 shot over the 200 yd backstop. (lack of zero stop blues....) Don't think I hit any cows....