My empirical data comes from hundreds of M24's, M110's, MK12's, MK13's, M2010's, SR25's, and Recce's. As well as a whole slew of hunting rifles. In that we have seen time and again that in a week of shooting we can expect to have 20-30 percent of issued Leupold variable Mark 4's develop problems. Quite a few will not function correctly straight out of the case. I see them side by side with NF, S&B, Hensoldt, Bushnell HDMR's, Vortex Razors, SWFA SS, etc. and yet don't have nearly the amount of problems out of all of them COMBINED as Leupold variable Mark 4's.
Same/same for hunting rifles.
Sometimes they lose zero, but mostly it's inconsistent/incorrect tracking. As soon as there is a question with any of them they go to the tracking board and are tested every 5 MOA for a total of 30 MOA or every 2 mils for a total of 10 mils. Tracking issues don't generally show up in small increments, which is why shooting the "box" with 4-5 MOA adjustments per side like most hunters do is useless.
