Thread: Calculating velocity

As above, max distance between your two ranges, and accurate measurement of your scope height. JBM is pretty simple to use, but it looks like you are about on the mark with 2700. Where are you based, I have a chrony you can borrow if you are in Canterbury.

Thanks for the input guys, I agree further out would be ideal, that's as far as we could get yesterday, I have decided to go somewhere else this afternoon and have another play, I will try jbm. Thanks for the crony offer but I'm way up the top in whangarei so not the most handy cheers though.