I like Kenton Industries..
But I want to reiterate that if the scope can't precisely perform "box drills" putting a ballistic turret on it isn't going to help anything...
Coincidentally just yesterday afternoon a buddy/neighbor was having issues sighting in his rifle and asked if I'd help him. We went out to the range and it was a challenge, but I got it dialed in. It was a challenge because the scope adjustments weren't changing the impacts like they should have been... Then I suggested to him that we do the box drills after I got it zeroed.
He has a Burris Scope and it has 1/4 inch POI adjustments or "clicks".. at 100 yards we adjusted his scope four clicks and it hit nearly 2 1/2 inches high.. we did four clicks right and the bullet impacted 1 1/2 inches right.. we went four clicks down and the impact only changed 1/2 inch... Four clicks left (which should have returned to zero) the impact only changed a half inch and was still hitting high.
My friend became frustrated and stated, "that's good enough" but the reality is ammo is expensive and he can't afford to buy and shoot a bunch, he had just dropped nearly a grand on this scope and he can't afford to replace it, etc. he and I and everyone knows in reality it's not "good enough".
Beware of human error when conducting the box drill and own it if you mif a shot.. Do what you can to get the rifle as steady in a sandbag rest as you can to eliminate human error.. you can't evaluate the preciseness of your equipment if you can't consistently hold it dead steady between and during shots..
Also, chronograph your ammo before doing the box drills.. I chronograph everything, all the time.. I've chronographed a lot of different ammo and I've found as much as 300 fps deviation between rounds out of the same box of ammo.. with that kind of deviation points of impact will drastically change downrange and it's impossible to measure the consistency and accuracy of your scope adjustments when each round is traveling at a different velocity...
Distance shooting is dependent upon consistency.. it requires that you physically be consistent, that your ammunition be consistent (bullet weight, velocity, etc ) that your scope adjustments be consistent.. and that's not even discussing the environmental factors..
But without consistency under ideal conditions, you haven't got a prayer in the field after introducing environmental factors..
Also, after you're all done and zeroed in, the next day or another day, go out and conduct a cold bore shot.. many guys spend a long day at the range and get everything all dialed in only to find that when they go hunting and take the shot the bullet didn't impact where it should have.. that's because they zeroed their rifle with a warm barrel that probably was pretty fouled after a day of shooting.
Another day go back and fire a cold bore shot, then on a separate target shoot a group.. note if and how much the POI changes.. you need to know this information. All hunting, and most sniping is conducted by a cold bore shot..
I've attached a picture of one of my targets when I was a Sniper Instructor. The one on the left is my cold bore shot, the one on the right is my five shot group immediately after.. note the POI change...
The other pic that looks like a mini explosion

went off is where I did a demo on my cold bore shot shooting the primer on a live 308 cartridge that I had poked through the corner of the target so just the head/primer end of the cartridge was visible..
The dime is just another example of demonstrating the precision you can obtain with a cold bore shot under ideal conditions when everything is consistent.. when you know where your cold bore shot is going to hit precisely, it's easy to tape a dime there and put a bullet through it.. (all of these targets in these pictures were at 100 yards, so nothing very far. But equipment, and fundamentals can be tested and evaluated easily at 100 yds. If you can't do it at 100 you sure as hell can't do it at 500 or 1,000.
Hopefully this little novella helped