New Benchrest Gun Finished Just a day setting up now

Discussion in 'Benchrest' started by Graham freeman, Feb 28, 2018.

  1. bobt

    bobt New Member

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    Must admit I am still confused. Are you saying that a bad crown can be corrected with an air stripper or am I missing something.
     
  2. hmangphilly

    hmangphilly Can't Re Member

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    A. Bad crown cannot be corrected with an airstripper .
    The op was saying he saw no need to create a crown ( recess ) in the muzzle in order to protect the pellet exit from accidental damage .
    The fitment of his muzzle device would shield the end of the barrel .
     
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  3. Waldo

    Waldo Active Member

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    I was talking to a gun smith (makes F class rifles ) he said one of the reason for an accurate crown is so that the pulse of air or gas that pushes the projectile out of the barrel is uniform . If a barrel has a poorly cut crown the pulse will deflect the projectile .

    So as long as the muzzle is cut accurately and fitted with a stripper /mod then you don't need a crown ?.
    Then why would manufactures supply rifles with crowned barrels and a stripper as standard ie Steyr. ?
     
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  4. hmangphilly

    hmangphilly Can't Re Member

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    Possibly

    To give you the option of not using the stripper.

    And / or

    Simply that people these days expect a barrel to be crowned .

    In practical terms , If you're setting a machine up to cut the end flat and true it not much extra effort to put a recognised crown on .

    It's the flat and true part that takes the effort

    Some makers do it better than others . I've found Steyr s usually jolly good.

    The famous s200 cz barrels often pretty pants .
    And don't even get me started about those other 'cz 'things
     
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  5. Waldo

    Waldo Active Member

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    Thanks Phil, I've been reading through various post on American BR sites ,it appears the jury is out on the necessity of a crown , one quote was " a perfect crown does nothing ,it's the imperfections in poor crowns that cause the problems ".
    One chap took a grinder ! to a barrel and completely buchered the muzzle ,then shot 5 shot groups at 100 yds, there was some effect on accuracy but not what you would expect! .

    Most hunting rifles have recessed crowns where as the target jobs have flat muzzles with no crown .
    So the reference to crown damage is obviously more relavant to the hunting side of things .

    I promise not to mention .cz things :)
     
    Last edited: Mar 3, 2019
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  6. Waldo

    Waldo Active Member

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    The crowns on the rifles I use are 11 degree target crowns , after a session the residue that acumalates on the muzzle face is uniform with no clear strips ,so these crowns seem to be cut accurately.

    I suppose ,thinking about it ! if the barrel is cut accurately with no burrs etc ,it's the same as having an accurately cut crown ?.
    And of coarse better than a shabby crown .
     
    Last edited: Mar 4, 2019
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  7. bobt

    bobt New Member

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    Any more updates Graham ?
    Interested in outdoor performance i.e. what's it like in the wind.
     
  8. Tiger

    Tiger Member

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    So which one is it?
     
  9. Fly fisher

    Fly fisher Member

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    What a lovely piece of kit. Best of luck with it.
     
  10. Graham freeman

    Graham freeman Member

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    Ok first big test of the new gun and barrel and out side benchrest shoot 25m 3 cards firs card 244 2nd card 248 3rd card 249 out of posable 250
    first place gold very good well happy
     
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  11. C.Eaton

    C.Eaton Confirmed Anschutz Nut...

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    Last week I shot a 250 /13X at my monthly Club comp. and came nowhere...;)
     
  12. Graham freeman

    Graham freeman Member

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    out side in the wind ???
     
  13. C.Eaton

    C.Eaton Confirmed Anschutz Nut...

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    Nope, indoors at 25yd, but you've got to start somewhere right...:D
    I'm trying to get some outdoor matches for my Club but the only place in the area that has a great 50/100yd range are a little bit insular to say the least.
     
  14. NeilM

    NeilM Well-Known Member

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    Why not build a couple of frames and shoot at the club, that's what we are doing in SWEFTA and at Mendip.

    We currently have a couple of clubs shooting competitions on a monthly basis, my club will be joining is soon (as soon as I get the frames installed) and there may be two more getting involved soon.
     
  15. Graham freeman

    Graham freeman Member

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  16. Graham freeman

    Graham freeman Member

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    have a look at Benchrest UK – Promote, encourage, facilitate and develop the sport of air rifle and rimfire benchrest shooting both within the UK and worldwide they do portals
     
  17. NeilM

    NeilM Well-Known Member

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    I'm aware of Benchrest UK already Graham, I was briefly at the AGM and was back at Portishead a couple of weeks ago to pick up another 200 targets from Richard Collins for one of the SWEFTA clubs.

    We are just trying to get br off the ground within SWEFTA; give us another year or so and we may even get a few folk entering Benchrest UK's competitions.
     
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  18. Graham freeman

    Graham freeman Member

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    sounds good to me look forward shooting against you in the future
     
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