At Long Last! Rapid Air Weapons HM1000x.25

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The gun comes with one mag. I ordered an extra one and just found out that they send you a coupon code for 50% off one mag when you register for the warranty on line. So I will now have three soon. However I also ordered a single shot tray with the gun and I actually like using it better when bench resting. Its a great design! Its round and you can rotate to the orientation that works best for you. It can be seen in the close up photos. It was only $12. compared to $72 for the mags. It was kind of shocking when I first saw the price of the mags. It looks like an oversize Marauder magazine and works the same basic way. Only the Mrod mags only cost $12. Economy of scale I suppose. 
 
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Well I couldn't leave it alone.The gun came stock only putting out 43 fpe. It was shooting 25 gr. JSB kings at 833 fps and 34 gr. mk 2 heavies at only 739. I thought this was strange as the gun is advertised on RAW,s website as a 55 fpe gun. I asked Martin about this and he said any faster could compromise accuracy. Like many here I was interested in pushing the 34 grain JSB heavies to over 900 fps to see if the accuracy holds up with the dramatic power increase they give. Martin said it would require enlarging the barrel port and maybe something else? So being the tinkerer I am I enlisted the help of a fellow forum member (thanks weatherby!) who told me how to turn up the power. So now with the hammer spring (factory spring) tension turned up as far as it will go (only two turns past stock) and the regulator tweaked a bit, I am now getting 56.5 fpe. Its now shooting the Kings at 952.5 and the heavies at 866 fps. That’s much better and the subjective power increase is significant! And ya it does have a bit of recoil now. I like that also! It really hits hard with 34 grain Heavies! That’s as much as I can get without enlarging the transfer port in the barrel. Would love to get them up to 950 and see how they do but then I don’t want to modify the gun so that it can’t be returned to stock easily. I am going to test the accuracy of the new power setting this Thanksgiving holiday starting today hopefully. Looks like the weather is finally going to cooperate.

Anyway I took some photo's as I worked on it and thought I would share.



The bottle unscrews without emptying the air. Just go slow until you hear a pop of air then just spin it off. It has it's own check valve.






The bottle is removed first.




Then the stock.




Then unscrew the fill port so when unscrewing the gauge/fill port block and regulator it will clear the barrel.






Here is the fill port removed.




This is the regulator. It is adjusted by tightening or loosening the nut that compresses the bellvile washers. Be sure and count and record the turns you make so it can be returned to stock setting.


 
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"30cal"Well I couldn't leave it alone.The gun came stock only putting out 43 fpe. It was shooting 25 gr. JSB kings at 833 fps and 34 gr. mk 2 heavies at only 739. I thought this was strange as the gun is advertised on RAW,s website as a 55 fpe gun. I asked Martin about this and he said any faster could compromise accuracy. Like many here I was interested in pushing the 34 grain JSB heavies to over 900 fps to see if the accuracy holds up with the dramatic power increase they give. Martin said it would require enlarging the barrel port and maybe something else? So being the tinkerer I am I enlisted the help of a fellow forum member (thanks weatherby!) who told me how to turn up the power. So now with the hammer spring (factory spring) tension turned up as far as it will go (only two turns past stock) and the regulator tweaked a bit, I am now getting 56.5 fpe. Its now shooting the Kings at 952.5 and the heavies at 866 fps. That’s much better and the subjective power increase is significant! And ya it does have a bit of recoil now. I like that also! It really hits hard with 34 grain Heavies! That’s as much as I can get without enlarging the transfer port in the barrel. Would love to get them up to 950 and see how they do but then I don’t want to modify the gun so that it can’t be returned to stock easily. I am going to test the accuracy of the new power setting this Thanksgiving holiday starting today hopefully. Looks like the weather is finally going to cooperate.

This is the regulator. It is adjusted by tightening or loosening the nut that compresses the bellvile washers. Be sure and count and record the turns you make so it can be returned to stock setting.



Click to expand...
Hi Jeff,

Last week I disassembled my own regulator as well, and found out there is an easier way to adjust the regulator pressure.
You can leave the pre-tension on the belleville springs as is, and adjust the regulator pressure by turning the knurled brass part (includes the washers as well).
Turning clockwise will decrease the reg. pressure, anti-clockwise will increase the reg. pressure. Only difference is that the regulator piston stroke will increase or decrease as well, but that is not a big deal.
B.t.w, there is an easy way to readout the regulator pressure, the big stainless steel plug in the bottom of the breech block can be removed, and you can place a manometer directly in the block. If I recall correctly the thread size is 1/4" BSP.

The reason I gave you the advise to adjust the pre-tension on the springs was with the FX regulator in mind.
The FX regulator design is about the same as the ones in FX rifles, however, there is one difference. The knurled part in the FX regulator is glued in the regulator housing, and as a result, it is not possible to adjust the pressure without changing the spring tension of the belleville washers.

Kind regards,

Gijs

P.s. Another tip for removing the bottle, turn it for about 2 turns anti-clockwise, and dry fire 2 or 3 shots. You can see the pressure decreasing on the manometer. When the remaining pressure is gone, it can be removed almost without force, and also your O-rings will be grateful ;-)
Be careful not to dry fire completely without pressure, your main valve is not gonna like that:)
 
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"I am now getting 56.5 fpe. Its now shooting the Kings at 952.5 and the heavies at 866 fps." 

.30 Cal, let us know how this higher power improves accuracy or not. Also, how many shots per fill at this new setting. Thanks.
I'm in the market for a .25 and I want one that can shoot both the regular kings and the heavies at one power setting. If it turns out the RAW and shoot them both at one power setting, I'm in!
 
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"chasdicapua""I am now getting 56.5 fpe. Its now shooting the Kings at 952.5 and the heavies at 866 fps." 

.30 Cal, let us know how this higher power improves accuracy or not. Also, how many shots per fill at this new setting. Thanks.
I'm in the market for a .25 and I want one that can shoot both the regular kings and the heavies at one power setting. If it turns out the RAW and shoot them both at one power setting, I'm in!

Yeah, me too. Want to see how it is doing. The only .25 rifles I have owned was the Crow Magnum I got from Beemans back when they first came out. Then a while back tried the Sumatra Carbine, but was not real satisfied. Looking for a quality piece. Sorry don't know how to get my reply out of the quote box.

Click to expand...
 
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Hi guys sorry I don't have any updates for you yet. The weather here has been stormy and wet and dark! Its Saturday morning and raining again. I hope to get some shooting weather on a weekend one of these days but it could be a while.
I can add that at my last test session I tried bench shooting at 100 yrds but was somewhat disappointed with the results. At 50 yds I was getting 5/16" to 5/8 groups but that did not translate to 100 for some reason. The best I could get was 2 1/4" to 3" groups. That was with almost no wind shooting both the reg Kings and the Heavy Mk2. The RAW shoots both of these about the same accuracy wise just at different speeds. Now it could just be I need to work on my technique at 100 or maybe the next batch of pellets will perform better. Only time and more practice will tell.
 
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"30cal"Well I couldn't leave it alone.The gun came stock only putting out 43 fpe. It was shooting 25 gr. JSB kings at 833 fps and 34 gr. mk 2 heavies at only 739. I thought this was strange as the gun is advertised on RAW,s website as a 55 fpe gun. I asked Martin about this and he said any faster could compromise accuracy. Like many here I was interested in pushing the 34 grain JSB heavies to over 900 fps to see if the accuracy holds up with the dramatic power increase they give. Martin said it would require enlarging the barrel port and maybe something else? So being the tinkerer I am I enlisted the help of a fellow forum member (thanks weatherby!) who told me how to turn up the power. So now with the hammer spring (factory spring) tension turned up as far as it will go (only two turns past stock) and the regulator tweaked a bit, I am now getting 56.5 fpe. Its now shooting the Kings at 952.5 and the heavies at 866 fps. That’s much better and the subjective power increase is significant! And ya it does have a bit of recoil now. I like that also! It really hits hard with 34 grain Heavies! That’s as much as I can get without enlarging the transfer port in the barrel. Would love to get them up to 950 and see how they do but then I don’t want to modify the gun so that it can’t be returned to stock easily. I am going to test the accuracy of the new power setting this Thanksgiving holiday starting today hopefully. Looks like the weather is finally going to cooperate.

Anyway I took some photo's as I worked on it and thought I would share.



The bottle unscrews without emptying the air. Just go slow until you hear a pop of air then just spin it off. It has it's own check valve.






The bottle is removed first.




Then the stock.




Then unscrew the fill port so when unscrewing the gauge/fill port block and regulator it will clear the barrel.






Here is the fill port removed.




This is the regulator. It is adjusted by tightening or loosening the nut that compresses the bellvile washers. Be sure and count and record the turns you make so it can be returned to stock setting.




My RAW HM1000x was working at 960fps with 25.4gr Jsb's and it was factory setting.shot 3crows at 134y without missing and I believe its realy high power accurate air rifle in the world.
Click to expand...
 
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