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FX tube
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8,2gr 1050fps at 180bar whit stronger hammerspring.

Sweet Glenn!
The bottom pic, what tube / bottle is that? it looks nice!

 

the bottom pic is whit a FX botle.

Yeah this is great! 1050 fps, that menas it will do 800-900fps in .22 cal

I figured it would just be a matter of time until we'd see the project done and this one does not disappoint. A lot of people are anxiously awaiting news on whether this kind of mod is possible, and then how to do it. Although I personally enjoy the convenience of CO2, it does limit one to shooting in warm seasons and this could be a very convenient alternate for the off-season. I can't wait to see a step-by-step tutorial on how to do this with a parts list. Thanks for posting this one. By the way, approximately how many full power shots can be expected per fill?

Tim

a nice string at 30 shott at 180bar. 950fps to 950fps hvit a top at 1050 fps

>this could be a very convenient alternate for the off-season.

I totally agree. Great observation. The closer I can get mine to a PCP the better.

So this does not use gas at all? totally converted to Pneumatic? How filled?

thanks,
g_h

In fact this would be a PCP. You'd be looking at getting a hand pump, large 4500 psi Carbon Fiber, Fiberglass tank (44,66 or 88 Cubic Foot) or the old 3300 psi Aluminum Scuba Tank setup. Some examples: http://www.pomona-airguns.com/PCP%20Accessories.htm

They are going to come out with the 1250 Walther Dominator next year so we might have an off the shelf solution that screws in where the valve goes.

This would be great but with limited shots at 30 with a higher fps. I am looking for getting several hundred shots at between say 800 and 850 fps in .22 with HPA regulated to 1350 psi or CO2 which Roald has broken the 800 barrier in .22 just recently!!

I think .22 is maxing out at 750fps with CO2 at this point.

Thanks thats great info!

g_h

I like the bottom one with the FX tube. That looks very sleek. What did you have to do to get it to fit?

Henry

how are you regulating the air into the gun or are you just filling the tank to 1350 psi? any info would be great

thanks
Matt

i use 180bar state inn to the value
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Major respect to you man Where were you able to get the valve? or is this a custom job?

Hi! I am interested if you can tell us what kind of hammer spring did you used! How much bigger?
In past (few years ago), I had a Crosman 2250B in .22 caliber. I changed the hammer spring whit a new one (9mm diameter and 1,5mm the wire). I enlarged the transfer port and the valve chamber, I changed the power plant (compressed air instead CO2) and at 140 bar I got 245m/s (805fps) with 1.03g (16grains) pellet. The key was a larger transfer port and a stronger hammer spring!
Thank you in advance!

did you turn that spring your self? or was it a stock part can you give the web site please

roald do sell a upgrade hammerspring and spacer.did work very vel in my 850...
so send him a message and he will sort it out fore you;)
cheers

thanks that makes things easy, if i could just ask where you got the adaptor that fits into the valve?
also does this mean that the fx bottles just screw into the adaptor making it easy to change bottles?
the reason i ask all theses questions is i use mine for hunting and co2 as we al know is rubbish in cold weather so having the benefit of small fx air bottles would be the best option.

many thanks for your help

cheers