RAW Rapid Creeping MV in RAW HM1000X

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Q

Quickoz

Member
Dec 17, 2023
17
2
35
YANCHEP, WA, Australia
G'day All,

Anyone got a fix for creeping MV over the bottle fill?? I run 25.39gr JSB.

I fill my bottle to 230bar, then I get consistant MV at 885fps avg for around 30 shots and then the MV Avg starts creeping up. Ends up low 900fps range after 60 shots which is where it falls off the reg at approx 150Bar. My hammer spring is set to give 885fps which I find gives good accuracy but that goes when it starts creeping and also POI shifts up. The Tune is lower then the tune the rifle came with but I had no joy with that accuracy wise with 25.39gr JSB Monsters.
 
Well you certainly can play with it more and see how if some improvement can be had. I personally would expect better accuracy than that out of a RAW. But if I'm not mistaken they usually come tuned to 950fps?? Or close with the 25.39gr from the factory. Generally on a PCP you want to back off 3-5% of max MV at that reg pressure. If accuracy isn't good there changing reg pressure is the way to go and repeat process again
 
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