You just shoot the rifle until it is below 80 and measure fps. Then you fill up to 90 and measure fps, etc. just one degassing.Or just go to 160 and see if it satisfies. Remember every time you want to make an adjustment means de-pressuring, pull the regulator, tweaking it, re-installing, re-pressurizing, checking velocity, pulling the reg back out, etc. , Been down this road before..
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