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VSR 10 very low fps?
hello all
i upgraded my vsr-10 with all the necessary parts to run a 150% 170% spring.
i wanted to see what fps it was shooting with the 170% spring. i was expecting some were between 500-600 fps with 0.2
what i got was 410 fps.
what would be causing it to be so low?
the only thing i can think of is the o-ring around the new piston head was very loose, is this normal?
any help please.
ta
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