I inherited a Red "Shooting Chrony" with funky black plastic things that go on both sides and you shoot through a apr. 2" x 6" hole, the box had some smoke damage but the chrony was clean and turned right on.
Took it out for the first time to check loads on a 7.62x25 Tokarev. The numbers made no sense
load A -- 4335 , 01222
load B -- 5309 , 1509
Load C -- 7075 , 0057
load D -- _122 (I gave up after that)
Any ideas or is it a boat anker?