What changed about the tune from the MRDs to the Grands tune?
Better breathing valve, shorter/stiffer hammer spring, and higher reg pressure. Basically more air, but also more air in a sort of quick pulse, versus the prior method of lowest reg pressure to make the desired speed. Less hammer tension on the shorter stiffer spring. Just judging by perceived cocking effort, it's not much different that most of what I've run before with the longer/weaker spring.
I expected the net effect of those changes to make it an air hog, but I'm still getting 30-32 shots per fill (versus the prior 38-40ish), and the report is surprisingly about what it was before.
Those are the changes but why in the heck they'd make such a profound effect on flyers or no flyers is the head scratcher. For sure need to do more shooting but those 5 cards (125 shots plus a few sighters each would make it 135-140ish shots) have me much more optimistic for Monster RDs, even if I don't understand the why.
(And no, I didn't take a Dremel to my valve, this is simply a different one. My OEM valve is still safe and sound, can revert back to it and everything else OEM if I decide to do so.)
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