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Altaros Regulators Pr900w / Stormrider

Discussion in 'Technical' started by R3DERP, May 24, 2020.

  1. R3DERP

    R3DERP Newbie

    Likes Received:
    Hello there Im new on this forum and really could use some help, I'm quite new to air guns in general too but here goes...
    I own a smk / Artemis / spa pr900w or Diana storm rider (it's actually the smk pr900w but they are all the same rifle in .177) and I recently installed a altaros regulator to try and get some more consistent shots and possibly a slightly higher shot count, now before the regulator was installed it was supposedly set to 110bar by the manufacturer which is supposed to translate to 11.8fpe. (my rifle was firing at 11.8fpe before)

    So I've installed the regulator and refilled the rifle using my stirrup pump up to the usual 190bar and now showing on the rifles pressure gauge is about 105bar so close enough, but here's the problem the count has gone from 40 shots to 9 shots and the power has dropped from the tested 11.8fpe to about 7.2fpe, I wouldn't mind a drop in power if it gave me loads more shots but it's not even ¼ of the shots.

    The pressure on the gauge drops below the set pressure after just 8 or 9 shots which is obviously ridiculous especially now that it's gone from shooting at 790fps to 620fps, before it would take 40 shots to go from 190bar down to 110bar but now it looks like 9 shots! I've recorded 38 shots with the regulator installed so you can see what the velocity is like it's in metres sorry about that but just multiply by 3.3 for a rough idea, it's almost like it's behaving unregulated but power is considerably less.

    Would anyone one say that I just need to adjust the pressure on the regulator or do you think it's faulty? Also any tips on removing it from the air cylinder? I'm assuming mole grips and the long regulator installation tool included with the regulator.

    shot 1:189
    shot 2:187
    shot 3:189
    shot 4:191
    shot 5:191
    shot 6:187
    shot 7:189
    shot 8:187
    shot 9:187

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