Page 1 of 2 12 LastLast
Results 1 to 15 of 19

Thread: Very Inaccurate Rifle

  1. #1
    Hsing-ee's Avatar
    Hsing-ee is offline may also be employed in conjunction with a drawn reciprocation dingle arm, to reduce sinusoidal repleneration
    Join Date
    Dec 2001
    Location
    Glasgow
    Posts
    18,241

    Very Inaccurate Rifle

    Took the old Crosman Model 70 to the range and tried a period Nikko Stirling 6x32 on it.

    Off a bench, at ten yards it got 10 shots into a 4 x 5 inch 'group'. Verily, tis like a cylinder-bore 0.410 shotgun.

    This is the worst accuracy of any air-rifle I have ever owned, on a par with the worst air-pistol I have ever owned.

    The trigger is abomination, granted, but this is a fixed-barrel, recoilless CO2 bolt-gun with a rifled barrel. Whatever can be going wrong? I am going to try a different scope on it and see if that is the problem, but once that is eliminated, what can be going on? Do these things shave pellets?

    I was expecting 1" groups at 10 yards, but this is ridiculous.

  2. #2
    Gareth W-B's Avatar
    Gareth W-B is offline Retired Mod & Airgun Anorak Extraordinaire
    Join Date
    Nov 2004
    Location
    Near(ish) Chelmsford
    Posts
    26,446
    .
    Use it as a fence post.
    _______________________________________________

    Done my bit for the BBS: http://www.airgunbbs.com/showthread....-being-a-mod-… now I’m a game-keeper turned poacher.

  3. #3
    tinbum's Avatar
    tinbum is offline Killer Vampire Lesbians on scooters
    Join Date
    Aug 2007
    Location
    Daarn Saaarf!
    Posts
    19,457
    I have just put a nice Leupold scope in sales, I'll bet that'd improve it!
    God rest ye jelly mental men

  4. #4
    Join Date
    Feb 2006
    Location
    Stevenage, Hertfordshire
    Posts
    5,095
    Quote Originally Posted by Hsing-ee View Post
    Took the old Crosman Model 70 to the range and tried a period Nikko Stirling 6x32 on it.

    Off a bench, at ten yards it got 10 shots into a 4 x 5 inch 'group'. Verily, tis like a cylinder-bore 0.410 shotgun.

    This is the worst accuracy of any air-rifle I have ever owned, on a par with the worst air-pistol I have ever owned.

    The trigger is abomination, granted, but this is a fixed-barrel, recoilless CO2 bolt-gun with a rifled barrel. Whatever can be going wrong? I am going to try a different scope on it and see if that is the problem, but once that is eliminated, what can be going on? Do these things shave pellets?

    I was expecting 1" groups at 10 yards, but this is ridiculous.

    Has the barrel been shortened ? Is the muzzle crown good?






  5. #5
    Hsing-ee's Avatar
    Hsing-ee is offline may also be employed in conjunction with a drawn reciprocation dingle arm, to reduce sinusoidal repleneration
    Join Date
    Dec 2001
    Location
    Glasgow
    Posts
    18,241
    Its unmodified, the crown is recessed inside the plastic outer barrel. Will have a lookski...

  6. #6
    Join Date
    Dec 2015
    Location
    Cambridge
    Posts
    486
    Period scope
    Does it still work ?

  7. #7
    Join Date
    Feb 2018
    Location
    Woolich
    Posts
    44
    wondering what is that pistol you were talking about?

  8. #8
    Hsing-ee's Avatar
    Hsing-ee is offline may also be employed in conjunction with a drawn reciprocation dingle arm, to reduce sinusoidal repleneration
    Join Date
    Dec 2001
    Location
    Glasgow
    Posts
    18,241
    Quote Originally Posted by thor123 View Post
    wondering what is that pistol you were talking about?
    Mondial Zip .177 pistol, Italian monkey-metal thing. Using hand-cast LEM Spitzer bullets it was incapable of hitting a 2 litre Cola bottle at 6 yards. With the usual 'Marksman' pellets it was a little better.

  9. #9
    Hsing-ee's Avatar
    Hsing-ee is offline may also be employed in conjunction with a drawn reciprocation dingle arm, to reduce sinusoidal repleneration
    Join Date
    Dec 2001
    Location
    Glasgow
    Posts
    18,241
    Quote Originally Posted by dayglowfroggy View Post
    Period scope
    Does it still work ?
    I'm going to swap it out for a modern one.

  10. #10
    Join Date
    Apr 2012
    Location
    Retford, Notts
    Posts
    34,968
    I have no experience with this particular model, Al.

    But, a couple of thoughts:-

    Firstly, as mentioned, some often say that Crosman barrel crowning can be very variable.

    Secondly, I'm wondering if the barrel is "fixed" at the breech end with the flimsy grub screw arrangement, as per the 766/2100 rifles and whether this has worked loose?
    THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
    NEXT EVENT :- May 4/5, 2024.........BOING!!

  11. #11
    eyebull's Avatar
    eyebull is offline Even a stopped clock is right twice a day
    Join Date
    Feb 2012
    Location
    Borehamwood
    Posts
    6,769
    Was going to mention crown also. Have you cleaned the bore? Someone may have been shooting silly plastic pellets through it, or there might be damage to the rifling.
    Good deals with these members

  12. #12
    Join Date
    May 2012
    Location
    wilmslow
    Posts
    307
    Push a pellet through it slowly with ansoft metal or plastic rod and look for loose or tight spots being especially mindful of the transit through the barrel crown.

  13. #13
    Hsing-ee's Avatar
    Hsing-ee is offline may also be employed in conjunction with a drawn reciprocation dingle arm, to reduce sinusoidal repleneration
    Join Date
    Dec 2001
    Location
    Glasgow
    Posts
    18,241
    Quote Originally Posted by TonyL View Post
    I have no experience with this particular model, Al.

    But, a couple of thoughts:-

    Firstly, as mentioned, some often say that Crosman barrel crowning can be very variable.

    Secondly, I'm wondering if the barrel is "fixed" at the breech end with the flimsy grub screw arrangement, as per the 766/2100 rifles and whether this has worked loose?
    It's a reet weird contraption with the 'straw' barrel cast inside a plastic liner. It was made to look like the Winchester Model 70 so it is the full 'Hemingway' but it shoots shite.

    I will try the pushing the pellet through idea, nice one. Might not be able to get to the crown as it is recessed.

  14. #14
    Join Date
    Apr 2002
    Location
    Near Wimbledon, SW London, or Lusaka, Zambia
    Posts
    26,403
    try using pellets of the correct calibre...
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

  15. #15
    Join Date
    Apr 2001
    Location
    Wet Cold Downtown Leicester
    Posts
    18,523
    Hmm something very wrong, I had one of these (great little gun, a bigger all steel PCP on these lines would be a winner)

    Mine was as accurate as anything else at 25 yards after which it runs out of puff.

    Scope, seals, crown in that order..... definately a problem.

    Do you still need the 35 stock as I've found it?

    If so fire me an email.
    A man can always use more alcohol, tobacco and firearms.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •