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All Springer/NP/PCP Air Gun Discussion General > German AirGun Gate

Difference between the 16J and 20J HW97K?

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ReturnTrip:
In .177, is the only difference the spring?

lefteyeshot:
16J=11.8fpe=800fps w/8.3grs pellet
20J=14.7fpe=892fps w/8.3grs pellet

SpiralGroove:

--- Quote from: ReturnTrip on April 19, 2024, 11:52:20 PM ---In .177, is the only difference the spring?
--- End quote ---

Yes ...............

Deerstalker:
This may help folks.

To convert to Joules multiply FPE by 1.3558,  Joules to FPE multiply by .7376.
FPE Formula is Pellet weight (gr) x FPS x FPS divided by 450240 or 450436.7

lefteyeshot:
I just use the Pyrmyd computer.

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