Re: Chronograph distance and true MV
I still use a 35-p chronograph with 3 screens spaced 2 feet apart.
Place the first screen 12 feet from the muzzel.
Fire the first shot and look at the difference between the prof screen and the
record screen. It will be a little different so if it drops 3 ft/per sec in the 2 feet
then all you have to do is add 3ft/sec for each 2 foot interval.(3x6=18 ft/sec).
It works very well if you dont have a computer handy and it's actual muzzel
velocity no matter what bullet you use.
I have used a blast screen( a peice of plywood with a small hole to shoot through)
for the big bores ( 416,458,460 etc ) and placed the chronograph 2 feet from the
muzzel and then removed the shield and set the screens back to 12 feet and found
no change in the velocities so I stoped using the blast shield because of setup time.
So either way (Eaglets,or the way I do it will work).
J E CUSTOM