Re: hold over reticle or dial?
I use a Night Force 3.5-15X50 for long range, and have always dialed it for shots past 450 yards. The retacle has several lines under the cross, and I had noted where they were in relation to before I dialed then after I dialed.
Last year I was scoping a meadow and saw a Grizzly crossing it. I knew from experience that the first line down was 600 yards with the scope set to zero (400 yard zero). I took the shot using the first line, worked perfectly. Of course this came from experience with this scope.
I also use a Nikon scope with Ballistic Plex reticle. I have it on a 30-06. The users manual with the scope said to use with a velocity of X, (can't remember off the top of my head) and a bullet weight of 165gr with a Coefficient of X (again can't remember the value) the lines will correspond with 100 yard increments. Works when I have time to use a range finder.
Now I also have a Range Finding scope I got from Cabela's. Circles getting smaller each is 18" at the corresponding yardage. I find this to be very effective. But the scope is calibrated for bullets at 3200 ft p s.
I have found the holdover type is much faster to use, but you have to do your homework. The load has to match the calibration on the scope.
As someone else said earlier, you can work up your load with a good scope like Leupold then once you have the load you want to shoot send the scope and the information to Leupold and they will do a set of custom turrets. Then the turrets are calibrated, and I have found these to work well also.
I honestly can not make a suggestion since I use many myself. I guess I like the Nikon.Cabela's hold over the best, they seem to see more use.
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