I've never tried it, but always wondered if you ran an SHP and tried to go faster than about 20 bps. You should be getting into the RT recharge cycle then. I can see the solenoid trying to fight the bottle pressure on the sear as it tries to push past the normal recharge. On the other hand, the SHP should be pushing that limit higher than normal anyway, so it is still beneficial to the rate of fire.
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