Author Topic: chronograph corrections? (Read 298 times)

bumble · « **on:** July 31, 2005, 05:25:48 PM »

I set the sensors of my Pact 1 about 10 feet from the muzzle of my rifles when checking loads. According to the writers most of us read I can correct the readings to actual muzzle velocity. How does that work?

bumble · « **Reply #1 on:** August 01, 2005, 01:28:32 PM »

Just as I thought. You've all read it too and didn't know what they meant. It's better knowing I'm not alone. :-)

EsoxLucius · « **Reply #2 on:** August 02, 2005, 06:02:48 AM »

This online program will adjust velocities for chronograph separation.

http://www.eskimo.com/~jbm/calculations/traj/traj.html

PaulS · « **Reply #3 on:** August 02, 2005, 02:13:24 PM »

Quote from: bumble

I set the sensors of my Pact 1 about 10 feet from the muzzle of my rifles when checking loads. According to the writers most of us read I can correct the readings to actual muzzle velocity. How does that work?

I set my censors at 15 feet and then look at the amount of velocity lost in the first five yards (in a computer ballistics program) I then add that amount to the chronographed velocity and it provides a "true" muzzle velocity. It is well within the shot to shot accuracy of any loads.

PaulS

bumble · « **Reply #4 on:** August 02, 2005, 02:49:36 PM »

I had hoped someone would give me a qualified answer. Two answers and a web site is why I come to these forums. Thank You Sirs.