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Old 11-07-2012, 12:07 AM   #4 (permalink)
idkfa
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Join Date: Mar 2007
Location: Vancouver, BC, Canada

CCM Fan
Am I correct in saying that you tried a bulk CO2 tank and a HPA tank when experiencing the FPS drop? You mention stock class but didn't specify that you were using 12 grams for your test.

If you are using a bulk tank, check that your pin valve isn't being choked off. If using 12 grams, follow cobyrne's advice above.

I can't imagine ambient temperature causing that severe of a drop. I have used a 3.5 oz tank in -10C and only dropped to 250 fps or so before adjusting my springs.
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