Chronograph distance?

[Glenn Tullius]

So this thought came to me...when the books say "muzzle velocity xxxx" . How far away is their chronograph from the "the muzzle"?!

 

[alf]

I use an Oehler 35P. On the wires that lead from the screens to the chronograph I wrap a piece of black electric tape every foot. At the 10' mark I placed a piece of red electricians tape. It is very easy to accurately place the screens at 10' each time I set the screens up.

I still use my Oehler 33, and use 10' screen spacing, starting 10' from the muzzle. I cut the conduit in 3 pieces for easier transporting. Easy to slide the 3 together, and hold along side the the muzzle for the 1st screen placement.