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You should be shooting around 340fps with that 140% spring. Your FPS estimate, is that with .20's? Because 290fps on .25's is ~330fps on .20's.
Do you have your hopup turned all the way off? I've seen a 100fps difference on one particular gun because the hopup was pretty much cranked all the way on. I shit you not, I have a chrono to verify it. I find properly adjusted hopup knocks off around 10-15 fps, FYI.
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Ronin 49 Team Member
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