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Affecting fps only would alter range, not accuracy. The range remains the same on slow semi auto, just has inconsistent accuracy.
On full auto or fast burst fire, it only starts to lose range as it freezes up, because the fps drops to like 80fps.
Normally shoots 1.4j on .30s, probably uses a bit more gas than it really NEEDS to, but both vectors (yes, I have two; one HK and one US) get 60-65 rounds per gas fill on slow semi auto.
Seal between hop and nozzle is pretty good on both. There's very little gas being used to shoot the BB, most of the gas on GBBRs is used to cycle the bolt.
I'm thinking a lighter slide with a weaker recoil spring would probably increase gas efficiency by a lot.
The way GBBRs work, the mag valve actually stays open until the bolt cycles back far enough to hit the release. So having a faster recoil would definitely use less gas, and using less gas would reduce cooldown.
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