Interesting. I have shot MPBR as that is how I was taught. I’ve been successful with that method for 40 years taking numerous animals 30+ between 250-450 yards. I shoot MOA scopes with BDC style reticles. I also validated all the hold overs based on actual testing. Seriously I would walk them back until I hit a clay pigeon consistently using the holdovers. Then ran the range finder and kept the distance on a card on the stock.
After finding this forum I am moving to MILs and starting to dial as I recognized the limitation of holdover is ROM 450-500 yards. I am expecting an improvement in group size and first hits from 250-600 yards once I learn how to use the system correctly. My first challenge is shooting from unknown angles at 450 yards caused me to be .7 MIL high based on the Hornady app. Now I need a new rangefinder to compensate for the angles. My Lecia is to old. All a big learning curve, but it is enjoyable and allows me to practice more.