Long Range Hunting Online Magazine

Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


.243 case dimensions

LinkBack Thread Tools Display Modes
Unread 09-22-2004, 08:13 AM
Silver Member
Join Date: Apr 2004
Location: Australia
Posts: 250
.243 case dimensions

Anyone had experience with Winchester .243 brass being significantly undersize when measured at the case head ? According to my source the measurement should be .471 .
My brass measures .463 before first firing . Expansion ring measures .475 after firing so quite an unsightly bulge .Is this a problem or just cosmetic ?
Thought my gunsmith must have used an oversize reamer at first .Any comments ? It's a .243 Ackley by the way .

[ 09-22-2004: Message edited by: Aussie ]
Reply With Quote
  •   #2  
    Unread 09-22-2004, 08:37 AM
    Silver Member
    Join Date: Aug 2004
    Location: utah
    Posts: 302
    Re: .243 case dimensions

    I know exactly what you are talking about,
    Win.brass is often undersized. you will
    never find the .471 you are looking for but
    the Lapua 243 brass is .469 instead of Win.
    being .463
    I discussed this same thing under "what is
    best brass for 22-250AI" check it out you
    will be amused (or horrified)
    Reply With Quote

    Unread 09-23-2004, 04:28 AM
    Silver Member
    Join Date: Apr 2004
    Location: Australia
    Posts: 250
    Re: .243 case dimensions

    Brian ,
    Thanks for the info.
    It was your comment on .22/250 brass that prompted this thread .
    Would still be interested in any comments on my chamber dimensions if any gunsmiths read this .
    Reply With Quote
    Unread 09-23-2004, 08:57 PM
    LB LB is offline
    Silver Member
    Join Date: Jul 2004
    Location: Upland, CA
    Posts: 423
    Re: .243 case dimensions

    This phenomenon has existed for a very long time, for whatever reason? It may be shrinkage in the molding/casting process? It may also be intentional, as with autoloaders? Think AR forward assist. I think you can order small base dies, for some cartridges; for sure 223 Remington? But, it never has created "much" of a problem, other than far as I know? And, it's true, I don't know that much. [img]images/icons/tongue.gif[/img]

    Good hunting. LB
    Reply With Quote
    Unread 09-23-2004, 09:27 PM
    Platinum Member
    Join Date: Sep 2004
    Location: on the rifle range in Utah
    Posts: 2,704
    Re: .243 case dimensions

    Great point. I never really thought about the dies/moldings shrinking over time but It sounds perfectly conceivable. I'll bet if that's the case, they probably know about it but won't ever change it due to cost of new dies, but they should!
    Find it
    Range it
    Click it
    Pull it
    Dump it

    If it's not far, it's boring.
    Reply With Quote


    Thread Tools
    Display Modes

    Similar Threads for: .243 case dimensions
    Thread Thread Starter Forum Replies Last Post
    Do cartridge case dimensions affect recoil? Varminator 911 Rifles, Bullets, Barrels & Ballistics 17 07-22-2016 07:58 PM
    case trim pilot correct size but inside case dimensions too small. partisan1911 Reloading 14 05-24-2010 01:36 AM
    Case dimensions for the new 300WSSM Mac11700 Rifles, Bullets, Barrels & Ballistics 1 10-28-2003 09:13 AM
    338 Lapua Case Dimensions dbhostler Rifles, Bullets, Barrels & Ballistics 3 09-11-2003 06:05 AM
    300 RUM Case Dimensions Triple BB Rifles, Bullets, Barrels & Ballistics 1 08-06-2003 07:15 AM

    All times are GMT -5. The time now is 08:31 AM.

    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC