Machined .25 blank LW barrel

Home Forums General Mods/Machinists Machined .25 blank LW barrel

Viewing 15 posts - 1 through 15 (of 21 total)
  • Author
    Posts
  • #1576
    oldshooter
    Participant

    Just recieved a machined lothar walther 25 Cal barrel (Machined from blank) for my shadow and fitted it but can’t obtain any reasonable grouping. 3″ at 27M! My 22 does sub .5″ groups. Any suggestions deeply appreachiated.

    #34416
    voltar-1
    Participant

    remove your silencer first off. Have a discussion with whoever supplied said barrel about how it shot for them.
    Check pellet fit and push some through it and make sure it never gets loose on the trip down the bore. Hopefully it tightens up in the last 1 1/2″ if the barrel is choked.
    Walter….

    #34417
    mm123522
    Participant

    Yah! What Voltar said. Check for the choke. Push a pellet through the bore with your cleaning rod. You should notice it get tighter twords the muzzle end when you start the pellet from the breach end. You could have the barrel in backwards . That is , with the choke at the breach end.

    Mark

    #34419
    justforfun
    Participant

    The first thing I would check is the crown.

    #34423
    rob3dr
    Participant

    My .25 Tony barrel wasnt doing as hot as I thought it should accuracy wise until I removed my mod on it…. groups just great now.

    May be worth a look as Walter said.

    #34425
    walkonking
    Participant

    Do you have any baffeling in your shadow?

    If so check it for clipping also

    #34464
    oldshooter
    Participant

    Thanks for all the advice/suggestions.

    So far we have tried groups with and without mod. No effect
    pressure from 200 bar down to 170 bar. no effect
    We even had barrel in vice and checked results (padded) and still no effect.
    We pushed a pellet down barrel from breech and incountered resistance all the way and could feel more at the muzzel so choke seems ok.
    I have E mailed back to Lothar Walther for advice. Hope we are not being overly ignorant but are not the blank barrels already crowned? Thinking trying to recrown barrel. Do have pictures of groups with .22 vs .25 at same range.

    #34507
    rustykfd
    Participant

    How about trying different pellets?

    #34516
    walkonking
    Participant

    Can you take a pict of that muzzle end and post it here so we can have a look at it?

    #34517
    voltar-1
    Participant

    yes a pic would be great. A pic of a couple pellets pushed through would help as well.
    Walter….

    #34551
    j3magnum
    Participant

    that barrel needs to be crowned… they come with a so-so crown job on them..

    #34552
    teflontron
    Participant

    It may be an obvious question, but how did the rifle shoot before you put the .25 barrel in it?

    #34680
    beargrease51
    Participant

    Hi, i would forget contacting LW, can’t see them throwing any light on the subject, two things i would do, recrown the muzzle propperly, and secondly scrub the bore with bore paste, i have encountered dirty bore’s in the past, and that will spit the pellets allover the place. If your running @ 12ft lbs, then Kodiak/Baracuda are not goin to be much use @ 31 gn. and that does not leave a great deal of choice in the pellet range as i have tried the other brands which i find inaccurate.Good luck and let us know when you have sorted it. Regards B51

    #34691
    oldshooter
    Participant

    Have sent barrel back to machinist and he is trying several things and more shooting from a vise. Here are a couple of grp pics one with .25 and one with .22 I (obviously) prefer the .22 groups. LW have not replied to my e mails. I believe there barrels are normally extremely accurate. The .22 barrel is a LW as well.
    .25 Cal Group (SAD)

    Here’s a .22 Group (Much happier)

    #34697
    voltar-1
    Participant

    I am wondering:

    Is this machinist familiar with barrel work?
    Have you had him do any other barrel work that ‘worked’?
    What does he think is the trouble?
    What do pellets pushed through the barrel look like?

    Walter….

Viewing 15 posts - 1 through 15 (of 21 total)
  • You must be logged in to reply to this topic.