I have only targets at 8, 10 and then every 5 yds so unless I can be bothered to set them up I use that then reinterpolate the clicks for every 2.5 yds. Saves me having to work it out in a hurry. Worse ones are probably 8-12 yds where you have a lot of clicks. In actual movement terms not that much at the target, 1/4moa click is 1/40 of an inch or .6 of a mm. So given a 15mm is going to give you 6mm of error before you clip an edge you can be 10 clicks out or 2.5 Moa before you miss for wrong clicks, which is a lot more than a 50yd target where about 5-6 will have you bouncing off an edge.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep