Uragan2 & RAW HM1000X, Help needed !

Hello Folks,

I’ve purchased both an Uragan 2 700mm and a RAW HM1000X chassis, both in.25 cal

The Uragan2 is just a little gem all around but, unlike his predecessor which I have in.30 cal and has a pinpoint accuracy, this newer one is just horrible in accuracy: up to 2,5 inch groups at 50m !
Since in my country shipping arms accros the boarder is related with huge administrative issues, I’d like to find a solution by myself first ! Therefore my first question in order to exclude at least the ammo issue: which kind of food does your own very same gun like most ? I must add that I inspected the barrel visually from outside and didn’t see some kind of dents in the baffles of the shroud, although I didn’t strip off the whole thing for closer inspection since, in order to be legal in my country, both the shroud as the added moderator had to be glued with 2k heavy duty glue to the barrel. I was able to unscrew the sumo (not without leaving some ugly dents from the tools) but, if possible otherwise, wouldn’t do the same to the shroud, convinced that it wouldn’t be possible without leaving some horrible scratches !

My second problem is the RAW, which started leaking through the small hole just behind the fill connecto/manifold element, right out of the box ! Since I didn’t get any answer and/or help either from Pyramydair nor [email protected], I just hope one of you guys may give me some advice…

I’ve stripped it down but didn’t see any problem, both of the O-rings on the regulator rod seem to be ok. I’ve tighten a bit the regulator washers and the leaking almost stopped, but this cannot be the solution since the pressure setting is now much to high and there is still some small leaking left…

Any help would have greatly appreciated and I do send you my very best regards over the pond

Heartily cheers from Switzerland,

Florian
 
Last edited:
Hey Florian,
Sorry to hear you have problems with your two new acquisitions:p.

I would call Martin and discuss, but as Corny has mentioned, when the RAW regulator leaks out its weep hole ... the regulator's stem, o-rings need to be changed out. I had to change mine out recently when I unscrewed the 480 cc bottle and the regulator unscrewed from the receiver instead. The entire bottle when through the reg and froze/hardened to O-rings.

Got a regulator (O-ring) kit from Martin and this solved the leak problem.

Be careful when working on your guns - they cost $2K+ each(y).
 
What are you shooting from the U2 - 700 that is so horribly bad in accuracy? This is a CZ unchoked barrel. It is, in my opinion, best for slug shooting.
I've tried Hades 26.54gr (avg 1'093 fps), JSB Exact King Heavy 33.95gr (avg 994 fps) and H&N Slug HP 36gr (avg 935 fps). I also have to say that for each of these ammo, the fps spread is very narrow, less than 5 fps between the lowest and the highest, so it seems to definetely must be a barrel (shroud baffles ?) issue !...
 
You can also call Martin at his shop, AirgunsUSA and speak directly with him if possible (931) 638-0241.
Thank you Ranchibi for your advise, but my english is very poor, so to discuss technical problems by phone would be even on another level !
But I'll try to call, (and see to order some o-rings as corny and SpiralGroove suggested, might fix the problem)
 
  • Like
Reactions: Ranchibi
Hey Florian,
Sorry to hear you have problems with your two new acquisitions:p.

I would call Martin and discuss, but as Corny has mentioned, when the RAW regulator leaks out its weep hole ... the regulator's stem, o-rings need to be changed out. I had to change mine out recently when I unscrewed the 480 cc bottle and the regulator unscrewed from the receiver instead. The entire bottle when through the reg and froze/hardened to O-rings.

Got a regulator (O-ring) kit from Martin and this solved the leak problem.

Be careful when working on your guns - they cost $2K+ each(y).
Thanks alot also to you, SpiralGroove, for your help ! Yes, I'll try to get some o-rings, woul be great if it's only that kind of issues !
I think with such high pressures acting on pcp seals, the slightest imperfection could cause some leaking, althoug, visually there isn't any flaw I could detect on the o-rings...
Thanks again and have a great week to come !
 
Florian, Just send Sandra, Martin's Wife and email @ [email protected].
She is Martin's Co-partner in the Airgun business.


- Explain in writing what you've learned here and that you have a HM1000x (Airforce) and she will know what you'll need.

Kirk
 
If G2 Uragan shroud is assembled the same as G1 it should just be glue on the threads. I have had glued ones before & got them off with those stuck jar lid openers by hand. Tough but did come off & no damage. Thats some seriouse bad accuracy for Uragan's. Ive had the .25. If dealer won't swap you out Uragans, I would try & get shroud off without damage. I would then somehow get a peek at barrel internals with bore light & magnification & or bore scope.. What are the groups doing when shooting them ? Completely eratic POI .?
also is that scope known good to go.?
Joe