Reply To: Air arms s500 bell curve

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BigTinBoat
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“sean48855”So I just filled my gun to 200 on the tank gauge and the guns gauge is reading about 185ish


OK, that’s a bit better. If you you are using the ending pressure reading from the gauge then also use the starting pressure from the gauge. From 185 bar down to 125 bar your efficiency is now 1.11, not good, but respectful. Personally I would fill the gun so that the gauge on the gun is at 200 bar and I’d be willing to bet you get a bell shaped curve.