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Thread: Rifle barrel and action dimensions list, info needed.

  1. #41
    Boolit Master
    Join Date
    May 2013
    Eastern WY
    A 55* threading tool is easily ground, the 55* threading gauge is available from many machine tool suppliers, so why not use 55* as matter of craftsmanship. The NRA Gunsmthing Guide - Updated has many thread dimension illustrated, including most mentioned here, along with other 'stuff'. Used available on Amazon - about $20. Machinery's Handbook should have all the threading specs.

  2. #42
    Boolit Master

    M-Tecs's Avatar
    Join Date
    Apr 2008
    Quote Originally Posted by speerchucker30x378 View Post
    I posted most of my mechanical drawings here for those that want them. Copying them all over to this site would be a major time drain pain. But if someone wants to that's fine by me.

    Great info. Thanks for posting it.

  3. #43
    Boolit Master
    Join Date
    Dec 2014
    UPSTATE new york

    perhaps this will fill in some holes

  4. #44
    Boolit Bub Wheelwaits's Avatar
    Join Date
    Aug 2017
    Deepennahartuh, TX
    De Hasse's book "Single Shot Rifles" has most of the older single shot action barrel thread information..My copys are in storage or I'd help.... I'm not sure they are still in print???

  5. #45
    Boolit Bub Doug Humbarger's Avatar
    Join Date
    Oct 2010
    CZ527 .988x1.25 mm pitch.
    CZ550 1.1x2.5mm pitch
    These 550 barrels are tight as all get out.
    Last one I did was a 416 Rigby that I rebarreled for a customer
    To 338 Lapua. Had to sacrifice the 416 bbl with a relief cut
    .003 in front of the reciever to relieve the tension and that barrel
    Was STILL pretty tight. They must be torqued down by gorillas .

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check