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

  1. #21
    Boolit Master Artful's Avatar
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    Quote Originally Posted by jkpq45 View Post
    Fun stuff from my "bag of tricks" after the link:
    Very nicely done - This needs to be a sticky

  2. #22
    Boolit Man
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    Thanks for the compliment, Artful. I've been trying to get into amateur gunsmithing and have gathered a few things linked in my previous post, some drawings of a checkmaker posted here before as well as the ANSI documents for chamber and cartridge dimensions of most calibers.
    Molds I have:
    Lee 457-340-F (.45-70 340gn)
    Lee TL452-230-2R (.45ACP 230gn)
    Lee TL356-124-2R (9mm/357Mag/38Spl 124gn)
    Lee C309-150-F (30-30, 7.62x39 150gn FNGC)
    Lee Key Drive 12ga 1oz Slug (12ga 438gn)
    RCBS 45-255-SWC (45LC/45Colt 255gr Keith)
    Lyman 429 244 (44Mag 255gn)
    Lyman 429 215 (44Mag 215gn)
    SkiesUnlimited #4Buck/#00Buck

  3. #23
    Boolit Master Artful's Avatar
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    Thanks to speerchucker30x3 over at practicalmachinist.com

    788




    Rem 700
    Thread 1 1/16" X 16
    Engagment .69 (11 threads)

  4. #24
    Boolit Master
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    On the Remington 700 drawing, the inner "corner" as shown is actually the chamber end. Don't bevel this much at all, because you are taking away the brass support at the web. I chamfer the big end, but at the chamber end I just use some 400 grit and polish it. You don't want a sharp edge, just polished.

  5. #25
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    Bullshop's Avatar
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    Thanks to all this is great!!!!!
    One more question about Mausers. On the milsurp Mausers and others like Interarms MK-X and FN are the threads Whitworth form? Are they inch threads? So I get this straight is the Whitworth form cut with a 55 degree tool angle with a radious tip? If yes then the tops and bottoms of the threads are radious?
    I am trying to learn this because I may want to modify some LR barrels to SR thread to fit some SR Turk actions I have.

  6. #26
    Boolit Master FrankG's Avatar
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    They are 55deg whitworth but if you are careful when cutting threads ,fitting for snug fit to action 60 deg threads work just fine .

  7. #27
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    Radious tip cutter? What to gauge the radious to?

  8. #28
    Boolit Master
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    This list and related notes seems to be really growing. I'd like to see this complied into a database or maybe an Excel document.
    Shoot Safe,
    Mike

    Retired Telephone Man
    NRA Endowment Member
    Marion Road Gun Club
    ( www.marionroad.com )

  9. #29
    Boolit Mold
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    Good thread, Google it popped up for another thread pitch and I saw Rossi 92. Not many work on the Rossi but I make 256wm barrels for them and work on them a lot so thought I’d pad the list.


    Rossi 92
    All threads are metric 60 degree, all other measurements of the guns are inch just like the Winchester it’s a clone of. Rossi has the cartage lifter detent cuts in the receiver wall where the original Winchesters have these cuts on an apron attached to the left guide rail. So other than the metric threads, different detent cuts, and bolt safety on newer ones Rossis are a direct clone of the early Winchesters.

    Barrel thread is M19x1mm, very fine. So fine it's a booger to cut well on a lathe, it's like cutting a 3/4"-40tpi thread.


    Winchester 92
    .809x20 (same as the 94) and a cheap stock 13/16-20 tap works great to open/clean a receiver, (13/16-20 is .8125” major .0075” bigger diameter) when re-barreling even if using an .809-20 threaded barrel . . . You can just about turn the 13/16 tap in there with your fingers but not quite.
    Andy

  10. #30
    Boolit Master
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    I am going to save this until I get back to the house in two weeks, I have the sharps info...........I think it is 10tpi in a flat thread, but I can't remember for sure
    The rules of the range are simple at best, Should you venture in that habitat, Don't cuss a man's dog, be good to the cook, And don't mess with a cowboy's hat. ~ Baxter Black

  11. #31
    Boolit Man


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    Savage 99 pre 1 millon S/N = .896" OD, 12 TPI square threads. .930" of thread plus .125" trunnion. After 1 mil they went to V threads but I don't know the pitch.

    Colt Light Rifle is 1", 16 TPI and a .890" or .870" shank (I forget)

    M1 Garand = .968" x 10 TPI square

    Ruger Blackhawk = .668" x 24 TPI

    Mosin Nagant .980"x 14 TPI

    Weatherby MK V = 1.061x 16 TPI shank length of .701" with only the middle .501" threaded. the .1" on the ends are a relief cut.

    Jap Arisaka 99 1.050"x 16.93 TPI x .7 shank

    Jap type 38 and 44 1.025" x 14 TPI x .708" shank

    Marlin 336 .780"x 12 TPI square x .770" shank.

  12. #32
    The trouble is, as with cartridges, reference books copy errors from one to another. The thread data for the Steyr (aka Mannlicher) M95, which I consider about the best of the straight-pull actions, is incorrect, or only correct in some examples. I have seen a couple of these dismantled, and the threads are about 1.06x12, just like the 6.5mm. Mannlichers and Mannlicher-Schoenauer. I have seen one well rebarrelled by turning down the rear surface of the threads in a barrel made for the M98 Mauser.

    I wouldn't be surprised to find others. You should check your actual rifle before you lay out money on anything.

    The difference between 55 and 60 degree threads isn't that important, as long as you screw them up really tight. (You wouldn't, for example, want that rifle put together as gently as benchresters often do.) The shape of the roots and crests is even less critical. American gunsmiths habitually cut and fit Mauser barrels with 60 degree threads, with no harm done.

    The 1x14 thread on the Lee-Enfields is the same as the large Martini, and I wouldn't be surprised to find it on the Snider and/or the inch-measurement version of the FN SLR. The small Martini is 3/4 x 14. Both of these are 55 degree Whitworth threads, but special taps and dies, with the 60 degree American thread, do exist and can often be bought on eBay. With the large Martini I have seen a successful rebarrelling job done with these.
    Last edited by Ballistics in Scotland; 11-19-2014 at 06:59 AM.

  13. #33
    Boolit Master

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    Quote Originally Posted by KCSO View Post
    Don't forget thread form. I have DeHass' books if you want copies of the drawings.
    Yes, thread form is very important. In this country we normally use a 60 degree V form, many others use the 55 degree V form. There are also square threads and a few that almost defy description. None of them are interchangeable.

  14. #34
    Boolit Mold
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    Mossberg MVP 5.56 (nut and non pinned recoil lug) Threads 7/8x28 2A tenon L 1.400" with a .075" relief at tenon face. 1" barrel diameter at tenon.
    Thread dimensions-
    Major .8738 - .8673
    Pitch .8506 - .8468
    Minor .8312

    Receiver diameter 1.200"

  15. #35
    Boolit Master



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    Quote Originally Posted by GrocMax View Post
    Mossberg MVP 5.56 (nut and non pinned recoil lug) Threads 7/8x28 2A tenon L 1.400" with a .075" relief at tenon face. 1" barrel diameter at tenon.
    Thread dimensions-
    Major .8738 - .8673
    Pitch .8506 - .8468
    Minor .8312

    Receiver diameter 1.200"
    Thanks I was just looking for this info.

  16. #36
    Boolit Master
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    Mosin nagants are Wentworth pattern threads, look at 762x54r.net

    Sent from my SM-G920V using Tapatalk

  17. #37
    Boolit Master ammohead's Avatar
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    What is the info for Savage model 340?

  18. #38
    Boolit Master

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    Threads... US 60 degree threads are Radius v formed threads and the radius is either computed off of the pitch formula and just slightly rounded on the bottom, better less rounded than too rounded. I just copy the first thread tools I made years ago off the fromula's. Whitworth thread is a 55 degree straight V thread with slightly squared tops, when you cut a Witworth finish up by making a pass over the top of the threads with a sanding sponge. Square threads like the Enfield and the Marlins are real holding threads and are cut with a tool that looks like a mini parting tool. You will need a set of thread wires if you don't want to be backing off all the time to screw the action in and out. If I get the threads to screw in say 3/4 or better and they are still a little tight I quit there and lap them in to a finish fit with 400 grit compound. Go to YOU Tube and check out Mr Pete's machine tios for a good tutorial on threading. His best tip... buy some delrin plastic and practice with that first, especially on Square or Acme threads.

  19. #39
    Boolit Master

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    Armalite AR30 barrel threads 1.125 X 18 UNEF-3a and muzzle 5/8 X 18 UN-3a, straight from Armalite

  20. #40
    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.

    http://forums.accuratereloading.com/...8671075902/p/1

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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
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LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check