There's a lot to go over here. First, your Zeiss scope is in 1/4" (inch), not MOA. So on JBM, your click adjustments are IPHY (inch per 100 yards or "in/100y"). Make sure your chart reflects this.

I have posted a drop chart below that shows inches and in/100y (or IPHY) amounts. Throw the term "clicks" out of your vocabulary. After all, what's a click? The word click has no actual value. In this example, 1 "click" = 1/4 IPHY value. 4 "clicks" = 1 IPHY value. Think in the adjustments that are on your scope. In this case, IPHY.

With this chart below, the rifle is zero'd at 100 yards. If you need to take a 400 yard shot, you would dial UP 8.8 (or closest to it, which is 8.75) on the elevation turret. 8.75 is 35, 1/4 IPHY increments up (or "clicks"). But, think in whole numbers, like the 8.75 amount, not how many "clicks" it takes. To do this correctly, your rifle must be zero'd at 100 yards and your turrets set to "0". This way you can keep track of your adjustments and return to a 100 yard zero easily.

This chart will get you close. But if your velocity is lower or higher, then you will need more or less elevation. Also, I ran it with a .447 G1 BC. The listed BC is .462, but that's above 2600 fps, which this bullet will be below. And the 168 grain SMK bullet is only good to about 700 or 800 yards, if it makes it that far. It is a very accurate bullet, but when it becomes unstable around subsonic speeds, it will tumble uncontrollably.


Oh, and always have the actual enviromental conditions plugged into your drop charts. the 3 main one's to get correct are temp, barametric pressure, and altitude. Humidity will effect trajectory the least, so I always enter mine at 50%. If the pressure or temps go up or down, it WILL effect your actual drop the further out you shoot. For this reason is why I hate shooters using preprogrammed ballistic turrets!!


Range Drop Drop Windage Windage Velocity Energy
(yd) (in) (in/100y) (in) (in/100y) (ft/s) (ft•lbs)
0 -1.8 *** 0 *** 2600 2521.3
100 0 0 0.8 0.8 2405.3 2157.9
200 -4.3 -2.1 3.4 1.7 2219.1 1836.6
300 -15.6 -5.2 7.9 2.6 2041.1 1553.8
400 -35.3 -8.8 14.6 3.6 1871.8 1306.8
500 -65 -13 23.8 4.8 1712.1 1093.3
600 -106.5 -17.8 35.7 6 1563.3 911.6

Also, I go out to the range about 1-2 times a week. Let me know if you want to head out to Top Gun some time with me. I could get you on target out to 500 yards there.

On your turret when at the hundred yard zero, does the turret show to be on "0"? Meaning you bore sight, fire it to zero it, then unscrew the turret screws, lift the turret (without clicking the erector) rotate it until the "0" is facing you and lines up with the elevation line. Have you done all this?

If so, you've got a solid zero on the rifle and the scope. I bet Chad's chart will get you pretty darn close, but you still need to shoot it to be sure. Document the environmental conditions every time you shoot. If you have a smart phone "Google" the nearest airport to your location to get current temp and baro. I use McKinney airport frequently, and "Shooter" ballistics on my phone.

Shooter gives Density Altitude. I write down the DA every time I shoot so I can look for trends. The most important trend I've found is that my .308 is very consistant, no matter what the environment is doing, out to 500 yards. But the chart goes to 1000 yards in case I have an electronic malfunction. Therefore I've got a pretty reliable dope chart taped to the rifle for corrections out to 1000. Beyond 500 I really need to pay attention to the environment.


I think what you were looking at in the past was the fact that each click you refer to represents different values at different ranges. 1/4 IPHY at 100 yards is 1/4". At 200 yards 1/4 IPHY is 1/2" at 300 yards its 3/4". The best thing to do is to not worry about inches any more. Think in IPHY since that's what your turrets are. I think in MILs since that's what my reticle and turrets are. People have asked me "how much does your .308 drop at a thousand yards?" I tell them 9.8 to 10.2 MILs, depending on the environment. When they look at me funny I say "thirty feet".

Happy Shooting!

Doubt I'll ever be shooting past 500 yards.