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Thread: Case forming warning

  1. #21
    Boolit Buddy
    Join Date
    May 2012
    Posts
    201
    I Used to form 6.5-06 cases from .25-06 or 270 brass. Worked great. Then I tried some militaty 30-06 and I think I had a thick neck-to the point where I blew up the gun. Welded the bolt shut, couldn’t open.
    I suggest a reloader measure before and again after and again after sizing.
    The 30/06, 270 and the 25/06 case body/including the shoulder are all the same.

    If you necked the 30/06 down count on the neck getting longer. Problems are created when the shoulder becomes part of the neck. I find it an advantage when I need to off set the neck of a generious chamber.

    F. Guffey

  2. #22
    Boolit Master uscra112's Avatar
    Join Date
    Jun 2006
    Location
    Switzerland of Ohio
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    3,355
    Quote Originally Posted by fguffey View Post
    I should be embarrassed, I am the one that said it is impossible to move a shoulder back with a die that has full case body support. I am also the one that fired 8mm57 rounds in my 8mm06 chamber without case head separation. the shoulder of the 8mm57 case is .127" from the shoulder of the 8mm06.
    F. Guffey
    FWIW - One very good way to achieve excessive shoulder setback is to fireform with a light load. OK with rimmed cases, but with rimless the explosion of the primer drives the case forward, and with a light load there isn't enough pressure to drive it back again.
    Eleutheromaniac

  3. #23
    Boolit Master
    Join Date
    Mar 2005
    Posts
    4,457
    Thickness of the case head may or may not be significant.
    What is important is the STRENGTH of the case head. The ability of the case head to withstand high pressure is dependent on the hardness of the brass too. It has demonstrated by Bob Hagle in. Handloader Magazine article about 50 years ago that higher Brinnel hardness case heads withstood higher pressures in the 7mm Rem Mag. He cut off the case bodies and measured the hardness of the case heads between the belt and the flash hole.

    Quote Originally Posted by fguffey View Post
    Reloaders; I have been told the military case is heavier because it is thicker. A lot of reloaders talked about it but I had trouble finding a reloader that weighed and or measuring.

    I told them if there was any truth it could only be a half-truth. All of my surplus 30/06 cases had a case head thickness of .200" when measured from the cup above the web to the case head. I compared the surplus cases to Remington 30/06 cases. The Remington case head had a thickness of .260"; that meant nothing to another reloader but if the Remington case head is .060" thicker the case head has to be heavier than a case head with a thickness of .200". It was then I realized I was not talking to a group that could keep up.

    They were weak on case head protrusion but that did not slow me down, I recommended the Remington case with the thick case head for safety. I wasted my time but just in case there was a reloader that was interested I did not want to miss them.

    F. Guffey
    EDG

  4. #24
    Boolit Buddy
    Join Date
    May 2012
    Posts
    201
    Thickness of the case head may or may not be significant.
    I would agree if you understood why the Remington case with the thick case head is safer than then the thousands of cases I have that are .200" thick.

    F. Guffey

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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