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Thread: Pneumatic Gun Pressure?

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    Exclamation Pneumatic Gun Pressure?

    I was just wondering what pressure I should have my pneu at. I emptied all the air yesterday, as it was pumped from a previous owner and I wanted to be able to know how much pressure is in it. Right now I have it at 10 bar (260 pumps). The highest it can go is 30 bar (925 pumps). Would it be worth the extra 665 pumps to get it up to 30 bar? I figure the only reason I may not want to go that high is because of loading. I am greener than a frog when it comes to this stuff (haven't even go in the water yet OR shot the gun), so I figured I should probably start off at a lower pressure, get my loading technique down, and then move to higher pressures. I want to be able to shoot carp, gar, and maybe a catfish or two if that matters. The gun is a Mares Cyrano.

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    20 to 30 BAR is the desirable pressure. You should always load with the selector switch in the low pressure position and then move to the high side if you are going to use the high pressure shooting. You probably won't get much out of 10 BAR no matter which position you use. Also never "dry" shoot.
    SPUC
    Tampa Bay Spearfishing Club

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    Talking

    Quote Originally Posted by Retired2Dive View Post
    20 to 30 BAR is the desirable pressure. You should always load with the selector switch in the low pressure position and then move to the high side if you are going to use the high pressure shooting. You probably won't get much out of 10 BAR no matter which position you use. Also never "dry" shoot.
    Nah my manual says to pressurize it with the selector in the max. setting, not the low. Yeah, I wasn't planning to dry fire it. I heard it's terrible on o-rings and the internals. Thanks for the info, guess I will start pumping away haha.

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    Load gun at high power, not low power.

    Open up gun and add a bit more fork oil. 10w or 7w
    Airguns tend to lack oil from manufacture.

    If you have a hand pump, pressurize it as much as you can.
    There are limitations with using a hand pump

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    Hey Greek, why do you recomend loading on high power? If I understand correctly, if the setting on the gun is on high power you can't decrease power back to 'low'.
    Somebody Stop Me

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    Quote Originally Posted by slingshaft View Post
    Hey Greek, why do you recomend loading on high power? If I understand correctly, if the setting on the gun is on high power you can't decrease power back to 'low'.
    Nah you can switch it back to low if you wanted to. There is a selector switch back by the handle that you can swith between high power and low power :P you pump it in high power because otherwise you would be pumping up just the low power resevoir (from what I understand).

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    Quote Originally Posted by slingshaft View Post
    Hey Greek, why do you recomend loading on high power? If I understand correctly, if the setting on the gun is on high power you can't decrease power back to 'low'.
    you just lower the lever to low power and some air goes into a larger chamber making it less pressure in the overall tube.

    Loading pneumatics is super easy simply because you use more muscles to load them. I think it's much easier than band guns when you get used to it. The longer ones, 115cm or more, are more difficult and require better technique.
    Last edited by greekdiver; 03-05-2010 at 04:00 PM.

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    So is it easier to load the shaft on high power?
    Somebody Stop Me

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    Quote Originally Posted by slingshaft View Post
    So is it easier to load the shaft on high power?
    I am not 100% sure. Just load the gun with a comfortable pressure on high power. You will notice very fast that you can up the pressure rapidly with use.

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    if the gun is loaded in low power it will shoot in low power, if loaded in high power it will shoot high power. you can't load in low, switch to high, then shoot with high power. Go to at least 20BAR, jump in the pool and practice loading, then power up to 30 BAR and go kill some fish.
    Still searching for that extra fish my neighbor always ask about

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    I kept my Cyrano guns at 25-28 bars, and they shot just fine.
    "At least the captain of the Titanic tried to miss the iceberg. Congressional Democrats aimed right for it."
    -Scott Rasmussen, 2010

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    The information in the manuals states that the selector switch can be used both ways, does this really not work as advertised? Every comment is very welcome. Cheers.
    Somebody Stop Me

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    Quote Originally Posted by slingshaft View Post
    The information in the manuals states that the selector switch can be used both ways, does this really not work as advertised? Every comment is very welcome. Cheers.
    The way I understand is that you MUST pressurize the gun in high power, so that the whole reservoir is pressurized. From there you can decide whether you want to shoot in high or low power via the selector switch. The selector switch just closes off part of the reservoir so that less pressure is used.

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    Hey there Buff410, I would say to pressurize your gun to were you are comfortable in loading it. If it's a bit difficult outside to almost(load), inside the water it will be much easier. Just try it out in the pool like B Lang said. By the way what Mares Cyrano do you have. I have a 970, and the 110. I'll try to post picks up so that you can see me setup on how I have them okay.

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    Quote Originally Posted by cubanpete007 View Post
    Just try it out in the pool like B Lang said. By the way what Mares Cyrano do you have. I have a 970, and the 110. I'll try to post picks up so that you can see me setup on how I have them okay.
    I have a Cyrano 970, completely stock. I want to get a reel for it, and I am in the process of making a camera mount to shoot video. I have it around 15 to 20 bar right now. I have to wait until it gets warm to get in the water. ohio is really cold right now, and i don't have a full wetsuit :/

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    Okay, on my 970 I have the barrell wrapped in black electric tape...so that is won't get dings and dents on it. I have a one bard 7mm shaft with just a shock cord on it with about 13 ft on line on it. My 110 is covered with camouflage duck tape, Omer reel with 150ft of kevlar line, one barb 7mm shaft on it. I think that it's a sick setup.
    Last edited by cubanpete007; 03-25-2010 at 03:03 PM.

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    Quote Originally Posted by cubanpete007 View Post
    Okay, on my 970 I have the barrell wrapped in black electric tape...so that is won't get dings and dents on it. I have a one bard 7mm shaft with just a shock cord on it with about 13 ft on line on it. My 110 is covered with camouflage duck tape, Omer reel with 150ft of kevlar line, one barb 7mm shaft on it. I think that it's a sick setup.
    You got an Omer reel? How did you get that to work? I read that the mares reel was the only one that would work? Will that Omer fit a 28 mm barrel like on the 970? Or just the 110?

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    Hey there Buff410,Yes that's an OMER reel, it should fit the 970. When you buy it at the shop, just tell them that it's for a pneumatic gun. You might have to to ad a bit of tape on the inside of the loop so that it will fit snugged you know.
    Last edited by cubanpete007; 03-29-2010 at 06:28 PM. Reason: Add words

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    Quote Originally Posted by cubanpete007 View Post
    Hey there Buff410,Yes that's an OMER reel, it should fit the 970. When you buy it at the shop, just tell them that it's for a pneumatic gun. You might have to to ad a bit of tape on the inside of the loop so that it will fit snugged you know.
    You may be better off shopping around for another reel for your pneumatic gun. The plastic Omer pneumatic gun reel is a poorly-made piece of junk. There are much better reels made outside the US. If you do end up using the Omer reel, cubanpete's suggestion is a good one. The rubberized paint on the gun barrel provides some friction to resist the U-shaped retaining hoop from sliding, but wrapping the hoop with some tape will make it more secure. I used rubber heat-shrink tubing, and that worked really well too.
    "At least the captain of the Titanic tried to miss the iceberg. Congressional Democrats aimed right for it."
    -Scott Rasmussen, 2010

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    Quote Originally Posted by Prodigal Son View Post
    You may be better off shopping around for another reel for your pneumatic gun. The plastic Omer pneumatic gun reel is a poorly-made piece of junk. There are much better reels made outside the US. If you do end up using the Omer reel, cubanpete's suggestion is a good one. The rubberized paint on the gun barrel provides some friction to resist the U-shaped retaining hoop from sliding, but wrapping the hoop with some tape will make it more secure. I used rubber heat-shrink tubing, and that worked really well too.
    And what might these outside the U.S. reels be? I thought the Mares reel looked like a piece of crap too, but that's just my opinion :P Does Beauchat make reels for pneumatics?

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