FX impact high power mods

Hoi Ernest,
i also worked on the Impact to increase power and have reached in .30 with 50 grains JSB,s 285 m/s =935fps and with 44.75 grains i get 295m/s =967fps.
Your idea with extra chamber also crossed my mind, but for testing i made a quick connector Foster on it and add pressure on it, up to 200 bar.
also have a extra brass hammer weight and a enlarged valve.
without the extra pressure i reached 905 fps with 44.75 in .30 cal.
If You do this it is necessary to reinforce valve seat and valve.
pictures wil follow
Cees
 
well done Cees, wow that's power!

I wouldn't go that far, so you're limited to bench shooting with hose attach to the gauge fitting, man I would have just bypass the reg all 2 gether. 

Just wanted to see and able to shoot that high power if needing too, but I lowered the reg to 130b to max speed of 860fps with 44g, with 48 shots I like this setting giving the best balance of power,accuracy and shot count. with all my testing I disabled the VS adjuster giving me lower ES.




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Thats nice Ernest
i also have a Boss in .30 and also reduced reg to 150 bar and hammer spring lowered to get 826 fps and get then 76 shots with the 44 gr.
presure is going down to 130.
it also has a moving barrel which is about 6 mm ging backwards, so no recoil at all, weight about 7 kg, good for benchrest
if you want pictures let me know, better by pm
regars Cees