Welcome to Mark Kenton, maker of the Tuned Trajectory Compensator TM.
I have been wanting to use one of these for years and finally got one installed last month. I took two deer with my XP handgun (Kirby Allen) at 330 and 440 yards during our WI antlerless season. It did everything I hoped. When hunting solo, it is very difficult to spot, range, chart, click, spot, range, adjust the clicks, repeat, repeat, repeat. Using Mark's ballistic drop compensating turret cap is a breeze. I'll be giving more examples during my hunts.
Kenton Industries, Tuned Trajectory Compensator TM