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88g CO2 Gas Bottles...

Discussion in 'Anything Airgun Related' started by Diopter, Feb 17, 2014.

  1. Diopter

    Diopter Member

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    Hi all

    I normally shoot with 12g CO2 powerlets, and these are a one time deal, once punctured you have to use them all up.

    My question is about the larger 88g CO2 'bottles'. Are they the same as the 12g powerlets i.e. no valve? Or do they have a valve in the end so that you could remove a partially used one?

    The reason I ask is that sometimes I don't use all of the CO2 in my 12g ones, and as the 88g ones hold a lot more gas I would hate to waste it at the end of a days shooting.

    Thanks all...
     
  2. Honest Bob

    Honest Bob Big Poster

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    88g are the same as 12g, ie no valve, you can get a on /off valve to fit them. But if your gun is gas tight, you should not need one. I own a SMK QB78, and leave it for months, with powerlets left in, with no loss of gas. Atb, Bob.
     
    Last edited: Feb 17, 2014
  3. Clubshot

    Clubshot Clubshot

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    There lays a interesting Point -

    General rule is that CO2 powered Guns should not be transported accross public Highway with a loaded CO2 Bulb

    Air Yes - CO2 Gas No - Check your local Police Information Web Site - believe it's covered on BASC web site

    BOB/R
     
  4. Honest Bob

    Honest Bob Big Poster

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    Correct. The Co2 must be removed from the gun, when transporting the gun, don't know why, bit of a stupid rule, when you can transport an air charged pcp. Did not mention this in my first reply, as transporting the gun was not mentioned in the post. atb. Bob.
     
    Last edited: Feb 18, 2014
  5. Shropshire Shooter

    Shropshire Shooter Well-Known Member

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    Just one more reason why I'd never buy a CO2 rifle.A few months ago I worked on a Umarex 850 Air Magnum for a mate who had managed to jam it solid (three pellets in the barrel, four more in the action - one was actually jamming the hammer).Although he'd only just fitted a new bottle the only way to remove the stock to gain access to the action was to slowly loosen the bottle - wasting about eight quids' worth of CO2.Once I'd got it working again I explained to him the drawbacks of the system (including the design fault that means that loading with the barrel pointing up can lead to a pellet falling into the action) and he's now looking for a PCP.
     
  6. Diopter

    Diopter Member

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    How the heck did he manage to get so many pellets stuck?

    I just use my cleaning rods with the jag end fitted to push the pellets out if any get stuck.

    Just bought a CO2 rifle, it shoots great, but I agree with you about the problem of bleeding the CO2 off. I was trying a few test shots with mine when I bought it just to see if the valves etc were all OK. Worked fine. Then I read the small print in the manual that says you cannot remove the filler cover while the gun is still under pressure. The manual advises dry firing the gun until the CO2 is empty! It took nearly half an hour of cocking and firing to empty the gun of CO2 (bolt action single shot).

    What I find stupid is that the gun has a bleed hole to release the excess gas, but in order to reach the bleed hole point (it's cut into the filler cap thread) you need to be able to undo the filler cap, which you can only do when the gun is empty!?

    The rifle holds two 12g CO2's (it's an XS79 .22 from SMK). What I plan to try though is to load one full CO2 powerlet and one empty one, and then chrono the rifle to see how many shots I get (at constant power) before the gas starts to die out. The idea is that at least I won't have to waste lots of gas if I only take a few shots.

    Actually, I don't mind wasting the gas (only 50p each), but what I did hate was having to dry fire the rifle a few hundred times until the gas pressure died down enough to allow me to undo the filler cap.

    Why they never fitted a bleed valve/tap, or maybe some method of holding the knock valve open (like I can on my CO2 pistols) I'll never know.

    Maybe there's a market here for anyone handy with a lathe?
     
  7. bobbie1

    bobbie1 Busy Member

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    No need for a lathe ,
    If you drill a 7 mm hole 75 mm from the end of the tube
    to the centre off hole ,
    then you can use a flat screwdriver to de-gas if needed,
    you put the screwdriver in the hole and twist , this presses the hammer against the valve ,

    it's also usefull if you go bulk fill ,as you can use it to cool the gun, this makes filling easy,
     

    Attached Files:

    Last edited: Feb 22, 2014
  8. ped

    ped Keyboard Hero

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    i assume it's a xs78 rather than a 79 if it takes 12g carts also using one full and one empty might give you a slightly lower fps than two full onesped
     
  9. Paul55

    Paul55 Posting Addict

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    Compare the cost of an 88g Co2 against the cost of 8 x 12g Co2, slightly more than 88g I know & you'll not want to use 88g ones :eek:
     
  10. Shropshire Shooter

    Shropshire Shooter Well-Known Member

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    Just kept going until he couldn't push any more in I suppose - he bought it secondhand off someone and is not an experienced shooter.

    Once I'd managed to strip it and remove the magazine the pellets tapped out quite easily with a length of hardwood dowel. What I found more alarming was the pellets inside the action :eek:
     
  11. smudgerii

    smudgerii Busy Member

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    you can buy an on/off valve from RAP4, which will allow you to turn off the supply and fire off any gas in the pre-chamber and the remove the gas bulb from the gun.
     
  12. smudgerii

    smudgerii Busy Member

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    He should just HPA the 850, £35 on ebay for the bottle. He can also add the on/off valve...
     
  13. SteveO

    SteveO Top Poster

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    The XS79 can be converted to high pressure for about £40, I did this as I wasn't prepared to waste any Co2 while tinkering, was one of the best moves I've made!
     
  14. smudgerii

    smudgerii Busy Member

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    Spent a few hours this week building up a HPA 79 for a 'looked after' young lad who came down to the range last week with his new foster carer... He is going to be buzzing tonight just waiting for the range to open in the morning.

    Almost new rifle £50, HPA £35, silencer £20, 3-9x50 £25, rifle is good for 100 shots per fill and is regulated all for £130.

    if he out shoots me it may develope a 'leak' :)
     
  15. SteveO

    SteveO Top Poster

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    Are they classed as regulated guns when you fit a HPA bottle?
     
  16. ratharvester

    ratharvester Donator

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    Good on ya mate:up:
     
  17. smudgerii

    smudgerii Busy Member

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    Yep, bottle is reg'd at 850psi. Or higher if you know what to do ;)
     
  18. SteveO

    SteveO Top Poster

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    Burst disks?
     
  19. smudgerii

    smudgerii Busy Member

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    easily replaced if needed, available on the 'bay'
     

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