Thread: trajectory validation distance

Originally Posted by Hunty1

So question for the wise folk on here, when validating drops how far do you need to shoot to get an accurate estimation of MV? Looking to validate a 7mm08.
Also is 2 points enough, eg 100yd zero check and measured drop at say 400yds? Or would you shoot 200 and 300 as well?
Im guessing like most things the more data points the better but would two work out accurately enough?

Cheers

Here’s what I do if you don’t have a chrony.

Sight in middle of the bull at exactly 100 yards.

Open any number of available ballistic websites (try hornady.com they have a ballistic calculator). Put in the data you have eg BC of bullet, sight in distance, estimate of speed (say 2750 fps). This program will spit out your come ups out to whatever distance you choose.

Go to 400 yards, adjust your scope and fire 3 shots. If they are 2 inches below the bull you need to come up 2 clicks. 1 click is roughly 1 inch at 400 yards (Moa). If 3 inches high you need to come down 3 clicks.

At this point go back to the ballistics program and back off the speed/or increase it till it fits where the bullets have landed.

Go back to 400 and have another 3 shots. Hopefully you are ready to go.

Chart can now be set up from 0-400 yards.