RAW Rapid RAW HM1000x Tuning using an external regulator?

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Raydee38

Raydee38

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Feb 27, 2021
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I am using a Huma reg on my benchrest RAW 22 and want to try out a bunch of different pellets. I tether the rifle with a external regulator and I am wondering if I was to just open the huma regulator as high as it will go (190 ish bar) could I just attach my external regulator and just adjust from a low pressure up until I find a sweet spot? I could then just go back and adjust the huma regulator to that pressure. If this would work I think it would really cut the tuning time way down.
 
Raydee38 said:
Maybe I am reading this wrong but that sounds back to me. If the Huma is set at the lowest setting then no matter what pressure I set the external reg at then it will still only be at the pressure of the Huma that is in the rifle.
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Yes you are correct. Not sure what I was thinking. Full pressure on the rifle, use external reg to fill plenum.
 
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I spent the morning testing a, new to me .22 barrel for my RAW Hm1000x with JTS Dead Center pellets and found a nice, sweet spot at 92-93 bar shooting the 18.1gr pellets at 905-910fps. At 50 yards I was shooting the same hole as long as I did my part in the wind. I started testing 25.83gr JTS pellets but I must not have turned my internal reg up enough because I could only get them to about 890fps, no matter if I moved the reg pressure from 120-145 bar. I will try them at a later date after I turn up the internal regulator.

I am wondering if once I find the perfect pressures for different pellets if I can just keep the internal reg turned up and just use the external reg all the time? The internal regulator will them just be a failsafe in case the external reg fails. This rifle is ONLY used as a bench gun so it will always be tethered when I am using it.
 
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Hobbyman2007 said:
You have it backwards. You want the Huma to be at the lowest setting. That would then have the external reg pressure in the plenum.
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Not correct as you want to open or raise the regulator setting into essentially "BYPASS" so the incoming air pressure set by the EXTERNAL regulator establishes what pressure the valve operates at.
 
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Raydee38 said:
I spent the morning testing a, new to me .22 barrel for my RAW Hm1000x with JTS Dead Center pellets and found a nice, sweet spot at 92-93 bar shooting the 18.1gr pellets at 905-910fps. At 50 yards I was shooting the same hole as long as I did my part in the wind. I started testing 25.83gr JTS pellets but I must not have turned my internal reg up enough because I could only get them to about 890fps, no matter if I moved the reg pressure from 120-145 bar. I will try them at a later date after I turn up the internal regulator.

I am wondering if once I find the perfect pressures for different pellets if I can just keep the internal reg turned up and just use the external reg all the time? The internal regulator will them just be a failsafe in case the external reg fails. This rifle is ONLY used as a bench gun so it will always be tethered when I am using it.
Click to expand...
If you OMIT the regulator and replace it with a Fast Flow manifold you will start seeing the primary tank act like a larger plenum. Pressure set by the incoming air should make for a very stable & consistent set up when tethered.
 
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Raydee38 said:
Any specific manifold that will work with the RAW?
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Mostly from back in the days of THEOBEN where Unregulated was used more frequently.
I would check with RAW, and confirm on size threads going into receiver your rifle is utilizing ( As there are 2 thread sizes ) and see if they are producing a "fast Flow manifold" that would replace the regulator ?
 
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