Reply To: Pellet velocity without Chronograph( pretty accurate.) Chronograph verified
Forums › Pellets, Projectiles, Slugs, & Ammo › Pellet velocity without Chronograph( pretty accurate.) Chronograph verified › Reply To: Pellet velocity without Chronograph( pretty accurate.) Chronograph verified
Gunnertrones you beat me to it. An you explained it better.
I have used a method similar to this quite a few times.
After zeroing your rifle at your preffered distance (likeley somewhere from 40 to 50 yards) enter all the nessasary info into Chairgun or whatever program you use. (Pellet BC, Scope height, ect) You can make an estimate of what you reckon the velocity should be.
After you are confident with your zero you can extend yoir target to 100 yards or further (The further the more accurate your velocity calculations will be)
DO NOT ADJUST your scope hold over at all. Shoot as if you were shooting at at your zero distance. Then you measure the POI change from the center of the target (where you were aiming)
You can then use your balistics program to see what the POI change should be at the velocity you guessed and the range you shot at (I used 100 yard as an example)
You then change the velocity on the program until you get the POI change that you meaured on your target.
Remember: The further the second target is the more accurate you will be able to get the velocity
You have to measure the distance to target (rangefinder) and POI change very accurately otherwise the velocity will be incorrect.
With this method you can come bloody close to the real thing.