Chet,

I've been looking for the same thing for about a year... The answer I have found is Sightron SIII 6-24 is really the best bang for the buck (based upon research, not field tested). The other option I have found is the Vortex PST line, but they are more expensive, and from what I've read from reviews, has more things go wrong with them... canted reticles seem to be the biggest problem.

If you are wanting target turrets then you should want them to be "exact" for what you're dialing in.... Sightron seems to have done that right....

SWFA is a cheaper scope that is being used in long range Milk jug shoots in UT. Not sure as to mag ranges that are offered however.