Testing Pneumatic Cylinders Power

For a project I need a lots of pneumatic cylinders, and I need to know fairly precise how much they can lift/push. So i tested them with compressor and hand pump.
All pneumatic components are brand new, never used.

Results:

Small Cylinder:

Powered by compressor: 435 grams.
Powered by large hand pump: 570 grams
www.youtube.com/watch?v=-PepLEpII8M

Large Cylinder:

Powered by compressor: 1810 grams.
Powered by large hand pump: 2450 grams
www.youtube.com/watch?v=oknGjeRnUbs