Go all the way!
Moose 102--Bought the Shooting Chrony Gamma, as it was on sale. Didn't know I needed all those bells & whistles until I had 'em!
It takes strings of 10 shots and averages yr fps. Gives you standard deviation, hi & lo speeds also. AND, it does all the math for you, and best of all, it writes it all down on a strip of paper on yr bench.
Takes just a little putzing to set up, but when I go to the range I normally plan to spend a goodly bit of time there so no problem.
If you want to shoot blackpowder over the Chrony there are guards that Shooting Chrony sells to put over the "eyes" of the sensor unit, which they recommend getting--sounds like a good idea.
One other item--the shades over the "eyes" are supported with steel rods--DON'T USE THE STEEL RODS!!! If you shoot one of the rods, and it WILL happen if you use the Chrony long enough, they will break the plastic base as they leave. Instead, get a set of thin dowels and sand the ends to fit in the sockets of the base, and the shades. If you shoot a thin dowel, that's all that gets damaged. I prepared several extra dowels for spares; haven't needed them yet (knock wood).
A final suggestion: get a cheap fishing-tackle box or similar, and keep all the Chrony stuff in it, including spare dowels, spare batteries, roll of adding machine paper, etc, etc. Using such a box, I don't have to fold up the Chrony sensor unit for transport, and all the little bits are all kept corralled, and I don't forget one small essential when packing to go shooting.
Bottom line: The printing, calculating Chrony works well for me. You might like it also.
