Update: Took it to the range mounted on my 300 Blk. The Dots on the reticle are really too big for precision work, but that isn't why I bought it so no problem. I sighted it in at 100 yards for my Supersonic handload, and then switched to my subsonic handloads and Seller and Beloit subsonic commercial. The third BDC dot down was right on the money for compensating for the subsonic loads at 100 yards. My hope is that if a suppressor requires further compensation, that the fourth (last) BDC Dot will align with that at 100 yards. Won't know until my stamp clears! But so far so good!