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Advice Titan Precharge Rifle

Discussion in 'Anything Airgun Related' started by Titan, Feb 27, 2021.

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  1. Titan

    Titan Member

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    Hi , new to the forum and looking for advice I have a Titan precharge .177 rifle. L/h stock ,TASCO sight. and I’m not sure what to do? I only shoot now and again in the garden, I had it for club target shooting when I was younger and now the separate charging air bottle has failed it’s test . Thoughts are -

    1. Sell the rifle (no idea how to price it . Is it a classic now ? .) and get a break/or levered rifle instead?

    2. get the gun serviced, (any advice how much this usually is) ? And a new bottle .

    Any advice much appreciated,
     

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  2. flatrajectory

    flatrajectory Keyboard Hero

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    If it is working leave it alone. If you only use it occassionaly get a cheap stirrup pump of that auction site for about £60.
    Pete.
     
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  3. Titan

    Titan Member

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    I’ve always been warned off the pumps because unfiltered air destroying the gun ?
     
  4. Geezer

    Geezer Big Poster

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    Welcome to the forum. You’ll see these advertised on Gun* etc for £350-400, but I reckon a sensible price for a private sale is more like £250. Gun only.

    Scope looks like a Tasco 6-24x40 TR. Worth about £80-100 on its own.
     
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  5. Titan

    Titan Member

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    Good point made about option of a pump instead of a bottle , are the pumps worth it for adhoc use ? Do they provide quality clean air to the rifle ?
     
  6. Alexall

    Alexall U-Div Gun Protectors

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    Pumps are certainly a sensible suggestion for the occasional use.

    It is very sensible to take internal rust seriously (of the pressurised vessel) that may weaken the structural integrity. Safety is number one.
    I have used pumps for many years before the moving onto a breathing tank with no problems of rust. When I was servicing the gun and changed the seals, I was rather surprised there was absolutely no signs of rust internally.

    I tend to pump up on dry sunny days and indoors only. I never pump at the club or on wet grass or outdoors in damp weather. I try to avoid the pump sucking in 'moist' air to put into the gun. This served me well for over 20 years.
     
  7. rabbitwrecker

    rabbitwrecker Black Latex Matters...

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    :welcome:

    Good advice above... :thumb:
     
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  8. Titan

    Titan Member

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    thanks for the info . Can you tell what pump you used please? or know of any quality ones with filters on them . I’ve seen the cheap eBay type ones, but can’t see if they are filtered or not ? Many thanks
     
  9. flatrajectory

    flatrajectory Keyboard Hero

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    Many of the cheap Chinese pumps have filters, it should be obvious from the adverts.
    I bought a stainless steel ,300 bar pump with filter off ebay for £55, about 3/4 years ago. It has never let me down.
    As has been stated , you are drawing in the air form around you, so only pump it up indoors in warm conditions, or if outside on warm days. Do this and you will have no problems with moisture.
    Pete.
     
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  10. Nobby

    Nobby Keyboard Hero

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    Actually the air in warm conditions can hold more water vapour than you might think. On a summer's day, 20C and 70 percent relative humidity, the air contains twice as much water vapour as on a wintry day, 5C and 90 percent RH.
     
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  11. Titan

    Titan Member

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    I don’t suppose there’s any good links to research on how much moisture content hand pumps expose your rifle to, compared to a cylinder charge ?
     
  12. flatrajectory

    flatrajectory Keyboard Hero

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    If this is the case then forget the weather and use it anytime. !
     
  13. Nobby

    Nobby Keyboard Hero

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    You'd need to do some calculations. Google psychrometric chart. You will see the amount of water vapour the air holds, varying with temperature and humidity. It's expressed as grams of water vapour per gram of air.

    Now you need to work out how many grams of air you are going to pump. Take air at 0.0012 grams per cc as a start point. If you are pumping let's say a 200cc reservoir up to 200 bar, from empty, that's 200 cc times 200 bar times 0.0012 grams per cc. I make that 48 grams of air. The partial pressure of water vapour (from the chart) will be something like 0.01, and 48 times 0.01 is 0.48, call it half a gram of water.

    In reality you won't be pumping from fully empty.
     
  14. trumpetier

    trumpetier Pro Poster

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    Your over thinking it, just get a cheap pump ;)
     
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  15. flatrajectory

    flatrajectory Keyboard Hero

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    Or, ... you could just forget all that science and just pump it up when the pressure is low. I am not suggesting Nobby is wrong, but rather, try not to worry too much about the finite science and just use the bl***y thing. It works for me.
     
  16. Alexall

    Alexall U-Div Gun Protectors

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    Perfectly valid point from a humidity point of view Nobby.

    I think a common sense approach is not far wrong for a beginner like Titan.

    Otherwise, we'll get into the realms of counting how many pumps equates to good sex.:)

    As a starter, looking after the equipment is a very sensible attitude - period. I hope you progress in shooting and maybe upgrade the gun as and when your interest develops.

    I am not for one second suggesting you 'palm' off dangerous gear, but I know many flippers who moves equipment on every fortnightly. Moisture issue don't even come into play.
     
  17. ped

    ped Big Poster

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    if you have any worries on your cylinder remove it and inspect it giving it a wipe through
    i've not had any issues with any of mine
     
  18. Stockscrew

    Stockscrew Posting Addict

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    A psychrometric chart will not on it's own give you the relative humidity (RH) of air. You will need a whirling hygrometer or similar to give wet and dry bulb temperatures, when these are known, the RH of air can be found on the psychrometric chart.
     
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  19. Stockscrew

    Stockscrew Posting Addict

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    What you have there is very suitable for Field Target shooting. I would find the nearest club when they reopen, go along with your Titan, you should be able to get an air fill there and have a go. You might find that you like it. If you do, you have a rifle that is well capable of matching anything else out there inaccuracy, is not out of place at FT, is a classic and all that is required to progress in the sport is an air bottle, minimum size 5L, 300 Bar pressure. As to a service, they are bulletproof and one would only be required if its leaking air, there's nothing else other than an occasional spot of oil on the back end of the loading bolt.
     
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  20. Nobby

    Nobby Keyboard Hero

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    Yes I know. I was proposing the use of the chart to establish typical values for summer and winter to permit the sums to be done.
     

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