Chronograph

[Alderman]

Was trying out a Caldwell Ballistic Precision Chronograph. Just shooting some cheap pellets from a .22 

Hatsan Gladius. Not sure of the BC for these so foot pounds might not be correct. I was curious what the speed would be at different power settings. 
Seems to work fine with an old iPhone I have. 

 

[MrP]

Notice that foot-pounds and "PF" are not the same. You are not using the same energy units in all three of those screenshots. It's some thing that I noticed when playing around with my chronograph I recently got. 

 

[Ezana4CE]

What does “PF” stand for?

 

[DesertSilver]

Power factor.