I had a target turret put on a 4.5-14x40mm Vari-X III about 6-7 years ago, by the Leupold Custom Shop. It only cost $60 then, but has been priceless to me. I've had the scope close to ten years now and never had a problem with it. I shot the barrel out of a Remington Sendero in 7mm RM with that scope on it and now have it mounted on a 700P in that caliber. I exclusively used the 150gn NBT with 67gn RL22, CCI BR2 for deer, varmints and targets and this combo was amazing out to 600yds. That's all I ever asked it to do, but it did it well.
If I had to do it over again, knowing what I know now, I'd go with the Mk IV LRT (either 4.5-14 or 6.5-20), just because the adjustments are already there, plus you have the 30mm tube with extra internal adjustment (more MOA over the 1" tubes).
I have used the Leupold Dual Dovetail mounting system all my life because it's really tough and the two piece base/rings looked better than a one-piece system. Now, I'd go with the one-piece Picatinny/Weaver style with built-in MOA. They just make more sense and work! if you want or need to reach out touch something. Hope this makes sense and helps. JohnnyK.
"The only thing necessay for the triumph of evil is for good men to do nothing."