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Thread: Crosman 1377 advice

  1. #31
    Join Date
    Oct 2012
    Location
    Nottingham
    Posts
    821
    Revised sear spring arrangement...

    http://imgur.com/NZzCfrb

    The spring is from the valve, there is no adjustment, but it is just a bit over 500g pull, checked with my home made target trigger weight.

    This is all getting very addictive.
    Too many guns, or not enough time?

  2. #32
    Join Date
    Mar 2011
    Location
    loughborough
    Posts
    838

    No show

    The link don't work for me !

  3. #33
    Join Date
    Oct 2012
    Location
    Nottingham
    Posts
    821

    Try now...

    Phase one frame https://imgur.com/a/NZzCfrb
    Last edited by Modski66; 14-07-2018 at 04:04 PM.
    Too many guns, or not enough time?

  4. #34
    Join Date
    Dec 2016
    Location
    leeds
    Posts
    2,061
    that'll do it I make my guides so that when the sear releases the guide bottoms out just after so you get an over pull stop

  5. #35
    Join Date
    Oct 2012
    Location
    Nottingham
    Posts
    821
    After lots of rested test shots, I am now convinced that the barrel has had it...
    Ideally, I would like to put a 14 inch 177 barrel on it, using the existing brass front end. What would be involved in making such a modification?

    Things I think might be a problem are:
    Sourcing a barrel at a reasonable cost.
    Getting the old barrel out of the breech.
    Making the probe compatible with the new barrel.

    What other advice can any of the wise folk offer?

    Cheers,

    Mark.
    Too many guns, or not enough time?

  6. #36
    Join Date
    Dec 2016
    Location
    leeds
    Posts
    2,061
    finding a barrel will be an issue only option is to get one from alliance (bit dear imo)or get one from gmac in 24" and either have them do the machining or find someone else to do it
    getting the original barrel out will be fun and will either involve heat and collets or easier to just cut it off and have the remainder machined out
    I have a drawing for the spec on the leade into the barrel
    far easier to get a new style steel breech then all you nee to do is get the 24" barrel from gmac cut to 14 and recrowned

  7. #37
    Join Date
    Oct 2012
    Location
    Nottingham
    Posts
    821
    Hmmmm...

    This is getting a bit of a dear do.

    Maybe a 10 inch barrel is long enough, and maybe the odd flyer just adds a bit of excitement.

    Perhaps the crown could do with some attention, and I will just concentrate on making it look pretty...
    Too many guns, or not enough time?

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