Brent
Well-Known Member
BB,
If you stand up an 8' sheet of plywood "plumb", at 100 yards, then get your rifle locked down solid at the bench, you can dial the full range of vertical turret adjustment to determine if it tracks a plumb line, and thus would shoot along a plumb line, saving you ammo and inconsistancies due to wind at 400 yards. (Also you'll see if your vertical hair remains vertical when you get it tracking a plumb line, something necessary for using holdover type reticles. The other thing that's easily done is to check the calibration of eack click and MOA at the same time. If your turrets are calibrated correctly, 1.0472" per MOA will show up as a clear 1/2" gain for every 10" the crosshairs move down the plywood. In other words, you dial 10 MOA and your reticle moves 10.5", 20 MOA and it moves 21", 80 MOA and it moves about 83.75" and so on. It's pretty simple to check and with most rifles using over 20 MOA to get to 1000 yards, you can see that a turret that is calibrated in inches and not MOA would be 1 MOA off, and that's over 10" at 1000 yards. Also, for "every" 20 MOA dialed in order to zero for a 2000 yard shot you'd be off 20". Any error that exists in turret calibration could leave you ****in in the wind if you don't know how much error is involved.
If you stand up an 8' sheet of plywood "plumb", at 100 yards, then get your rifle locked down solid at the bench, you can dial the full range of vertical turret adjustment to determine if it tracks a plumb line, and thus would shoot along a plumb line, saving you ammo and inconsistancies due to wind at 400 yards. (Also you'll see if your vertical hair remains vertical when you get it tracking a plumb line, something necessary for using holdover type reticles. The other thing that's easily done is to check the calibration of eack click and MOA at the same time. If your turrets are calibrated correctly, 1.0472" per MOA will show up as a clear 1/2" gain for every 10" the crosshairs move down the plywood. In other words, you dial 10 MOA and your reticle moves 10.5", 20 MOA and it moves 21", 80 MOA and it moves about 83.75" and so on. It's pretty simple to check and with most rifles using over 20 MOA to get to 1000 yards, you can see that a turret that is calibrated in inches and not MOA would be 1 MOA off, and that's over 10" at 1000 yards. Also, for "every" 20 MOA dialed in order to zero for a 2000 yard shot you'd be off 20". Any error that exists in turret calibration could leave you ****in in the wind if you don't know how much error is involved.
