I don't change ammo with this set up. I'll have the original dial if I ever do. It seemed like a great concept. Does it not remove one factor from the equation? As promoted, all I need to know is the range, which I will.
If you are wanting to shoot out to 400 yards, it's a simple concept to dial to the number "4" on the turret and pull the trigger. But if you change your environmentals (temp, elevation, pressure, mainly temps) from what the turret was set up for, you can easily be off.
I have had guys call me shooting my custom ammo (ammo tuned to the rifle shooting sub 20 fps extreme spreads) with a "custom turret" and they be upset that they missed a shot at 600 or 800 yards because the "ammo was off". I will run the numbers on their drop data for the "custom turret" and then run the numbers to the exact conditions they were shooting in. I will show them the trajectory differences and explain why. The next question they ask me is "then why do I have a custom turret?". And then my comment is why do you. LEARN MOA OR MILS and dial your come-up to the exact conditions you are shooting in, and forget about the custom turrets!! If you just want to shoot out to 300-400 yards and want to dial to a 3 or a 4 on the turret, it should get you on target close enough to make a kill shot most of the time. But once you shoot enough and understand drop, I often times don't even need to dial for 300 or 400, it's easier to hold it anyway.
You are taking a finely tuned system (system= rifle, ammo, and scope), and educing error into equation with a "custom turret", which is not custom at all. I'm not a fan, and I see a lot of shooters cuss these turrets after using them for some time.