Thread: calculator able to predict projectile pass height over variuis distances

1. 91 metres is about 100 yards.

2. It appears that you are wanting to shoot at 91m, to check that your adjustment for a 600m shot is correct. There are 2 parts to this:
a) has the scope adjusted the point of impact by the correct amount as per the ballistic calculator solution? This is simple to check - what is the value of 51 clicks at 91m? Assuming a standard 1/4moa at 100y click - .25 inch*51; convert to mm - this is 32.385cm which is probably close enough to your 33.5cm to say that yes, the scope clicks adjust approximately correctly within the noise of the system limiting your ability to measure it accurately. You shouldn't be surprised to get 1cm or more of noise in your POI at 100m the way the vast majority of hunters zero).
b) Is the ballistic calculator solution correct to actually hit a target at 600m? You need to shoot at 600m to check this.

If the solution is not actually correct at 600m, you will need to check a variety of things to understand why. It also depends on the definition of correct - do you need to make a first round hit on small target, or is "getting on paper" acceptable?
1. Do you have a solid zero - i.e. a large enough sample size of shots in your zeroing process to have a clear picture of what your real mean point of impact is?
2. Is your velocity measurement accurate? Was it measured with a reliable instrument used correctly, and do you have a large enough sample size of shots to have an accurate mean velocity?
3. Do you have a large enough sample size of shots at 600m to say with confidence that the ballistic calculator solution is actually incorrect?
4. Is your scope height over bore measured and entered correctly?
5. Is the target actually at 600m or is there ranging error?
6. Is there a shooting incline?
7. Are all environmental factors measured and input accurately?