Range Report Instrumental to Muzzle Velocity

[95LTZ]

Having a little brain fade. Does anyone have the formula handy to convert Instrumental velocity to muzzle velocity? Oehler's program has it but with a fairly new computer & I can't find the disc. Seems to me that it was something like 25 fps for the chrono being 15ft. from the actual muzzle.
Semper Fi

 

[ChadTRG42]

Re: Instrumental to Muzzle Velocity

When typing my info into a ballistics program, I am getting about 9 fps faster at 15 ft.

 

[95LTZ]

Re: Instrumental to Muzzle Velocity

Thanks, now maybe I can get some sleep.

 

[95LTZ]

Re: Instrumental to Muzzle Velocity

I was able to get ahold of the folks at Oehler Research today on the phone. They said that I should use 7 fps as an average for the middle screen being 15 ft. from the muzzle. They also said that there were lots of variables but it would be safe to use 7 fps at the 15 ft. distance.
Semper Fi