RotoMetals2WidenersMidSouth Shooters SupplyLoad Data
Reloading EverythingRepackboxLee PrecisionTitan Reloading
Inline Fabrication
Results 1 to 10 of 10

Thread: Assumed neck thickness gage. Yes, no?

  1. #1
    Boolit Master 15meter's Avatar
    Join Date
    Feb 2017
    Location
    SE Michigan
    Posts
    2,508

    Assumed neck thickness gage. Yes, no?

    Click image for larger version. 

Name:	20220629_104422_resized_1.jpg 
Views:	58 
Size:	33.6 KB 
ID:	301823

    This came drifting into the gun club for dissection and discussion.

    The old guy carting it in is cleaning out an even older(but not getting any older no more) guy's reloading stash. This was in amongst the stuff.

    To my eye it looks like a case neck thickness gage set up for probably .243. Pin is too fat for a .22 but not by much. .22 was the only case we had to try, 90% of this club is shotgun 10% pistol. they don't even have a rifle range so no range scrap brass to experiment with.

    Anybody used or have seen such an animal?

  2. #2
    Moderator


    Winger Ed.'s Avatar
    Join Date
    May 2007
    Location
    Just outside Gun Barrel City, Texas
    Posts
    9,479
    I've never seen anything like it.
    It might be like some of the oddities that end up among my 'shoot'n' stuff that really doesn't belong with them.
    It might give you a hint if he was some sort of target shoot'n, super bench rest guy.
    Nobody else hardly bothers with neck thickness measurements.

    For neck thickness, I always measured inside and outside diameter, subtracted the inside dia. and divided that by 2.
    In school: We learn lessons, and are given tests.
    In life: We are given tests, and learn lessons.


    OK People. Enough of this idle chit-chat.
    This ain't your Grandma's sewing circle.
    EVERYONE!
    Back to your oars. The Captain wants to waterski.

  3. #3
    Boolit Grand Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    10,572
    IIRC often called a 'ball' mic. Get a smaller ball end.
    Whatever!

  4. #4
    Boolit Master
    farmerjim's Avatar
    Join Date
    Nov 2012
    Location
    St. Francisville, Louisiana
    Posts
    1,925
    As popper noted, I use a ball mike to measure the case thickness on 300 BO made from 223. Some cases are too thick and need to be neck turned. The ball mike has a ball on the far end instead of a flat.
    That said, I think it is a neck thickness gauge.
    There is no difference between communism and socialism, except in the means of achieving the same ultimate end: communism proposes to enslave men by force, socialism—by vote. It is merely the difference between murder and suicide. Ayn Rand

  5. #5
    Boolit Grand Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    14,454
    I would say thats a wall thickness tool of the home made variety. Maybe not for case necks but for bullet jackets when swaging.
    Thats an old Ideal indicator mechanical style that reads to .001. If the pivot on the arm is 10-1 then it will read to .0001. But it will only have +- .001 range instead of the original .010

  6. #6
    Boolit Master 15meter's Avatar
    Join Date
    Feb 2017
    Location
    SE Michigan
    Posts
    2,508
    Pretty sure it's reloading stuff. Place case mouth over rounded pin near top of photo, spring loaded long arm ho!ds it tight against post and rotate. OD of case rides against little gizzy with the tiny hole, operating the indicator near the bottom of the picture that registers deflection shown on the graduated scale.

    That's my take on it anyway.

    Not a ball mic:https://www.brownells.com/reloading/...10090301008005

    Just curious if anyone got consistent readings with one, I've used a lot of gages over the years, this one didn't look like it would be able to pass a gage repeatability and reproducibility study.

  7. #7
    Boolit Master 15meter's Avatar
    Join Date
    Feb 2017
    Location
    SE Michigan
    Posts
    2,508
    And I think it might have been a commercially produced item. It was in a plastic case that fit it like it was sized for it. May have been just luck, but length, width and height were a pretty good fit.

  8. #8
    Boolit Grand Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    14,454
    I have one I made that uses a mititoyo dial indicator It is accurate and repeats. But it is way different that what is shown in the picture.

  9. #9
    Boolit Grand Master
    Mk42gunner's Avatar
    Join Date
    Aug 2005
    Location
    Butler, MO
    Posts
    9,020
    I've got a for real ball mike marketed by Lyman, but I can see how that would probably work okay.

    Robert

  10. #10
    Boolit Grand Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    14,454
    That set up just dosnt look right to me. The case and levers spring tension would be pushing the case neck off the mandrel where the measuring is being done, not up against it meaning that out of roundness in the neck as well as wall thickness would affect it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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