Information - Cartridges (ELR-class w/ min 338 LM’s muzzle energy*)
338-378 Weatherby, SAAMI
 338-408 CT, drawing***
 338 Allen Magnum
 338 Allen Xpress
 338 Big Baer
 338 Edge and 338 Edge +P (chamber reamer drawing, pg. 1**)
 338 Edge MK II (see post #20 in this LRH thread)
 338 Excalibur, SAAMI, (chamber reamer drawing, pg. 2**)
 338 Lapua Magnum, wiki, CIP (pg. 106) (chamber reamer drawing, pg. 13**); (chamber reamer drawing from Caina-Longbranch Defense Systems, Canada, specifically for use with 300 gr SMKs, i.e., the CLB reamer)
 338 Laupa Magnum Improved (40 degree) (chamber reamer drawing**), drawing #1, #2, #3***
      NOTE: This drawing is more recent than the one in the package which includes the 338 LM.
 338 Little Dave (8.5 x 55), from Austria (site is in German, bing translator here)
 338 Norma Magnum, wiki, article (review)#1, article (review)#2, (chamber reamer drawing - CIP minimum material**), (chamber reamer drawing (338 Norma Magnum USA) - CIP maximum material****)
 338 SnipeTac (chamber reamer drawing, 300 gr, pg. 3**)
 338 Tejas
 8.59 (.338) Titan (Lazzeroni) (chamber reamer drawing**)
 338 Xtreme
 338 Yellow B (Vigilance)
 338 Yogi (Dave Tooley) - TooleyRifle at Carolina.rr.com
 375/50 JGS, drawing***
 375 Allen Magnum
 375 Allen Xpress
 375 CheyTac (also see 408 CheyTac wiki) (chamber reamer drawing, pg. 4**), drawing***
 375 CheyTac Improved, drawing***
 375 Remington Ultra Magnum (RUM), wiki, SAAMI
 9.53mm (.375) Saturn (Lazzeroni) (chamber reamer drawing, pg. 11**)
 375 SnipeTac (chamber reamer drawing, pg. 5**)
 375 Tejas
 375 Viersco Magnum (VM2)
 378 Weatherby, SAAMI
 408 CheyTac, wiki (chamber reamer drawing, pg. 6**), drawing #1, #2***
 408 CheyTac Improved, drawing***
 408 CheyTac Tejas (pic and poster’s comment, can’t confirm pic matches that cartridge), drawing***
 416 Barrett, wiki
416 TYR (10.6x80, Grillmayer)(base photo)
 416 Viersco Magnum
 458 Viersco Magnum
 460 Steyr (and here for comparo photo) (chamber reamer drawing, pg. 8**)
 20/50 (Anzio)
 50/20mm (M-103) PAC-NOR, drawing***
 50 BMG(12.7x99mm NATO and Match), wiki, CIP (pg. 117), drawing***
 50 BMG Tejas
 50 DTC-EDM, drawing***
 50 DTC Europ (Danis), drawing***
 50 McMurdo, drawing***
 50 Spotter (Orig), drawing***
 50 Vulcan, drawing***
 510 Allen Magnum
 510 DTC Europ (50 DTC), GunWiki, wiki (chamber reamer drawing, pg. 9**)
 12.7x108mm, wiki (chamber reamer drawing, pg. 10**)
 55 Boyes, drawing***
 14.5mm JDJ
 14.5x114mm (Russian) wiki
 14.9x102mm SOP, pic (with permission from the developer), blog, video, test rifle pic
General footnote:  There is NO industry standard/control over non-CIP/SAAMI drawings, e.g., drawings with the SAME cartridge name may have DIFFERENT dimensions. Additionally, even for the same "cartridge case" dimensions, the throat dimensions may vary. Project-specific chamber/chamber reamer drawings are your best source of dimensions. Proceed with caution!
CIP (Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives - roughly the European equivalent of SAAMI) cartridge and chamber drawings:
    338 Lapua Magnum (pg. 106 - link above)
    338 Norma Magnum (CIP’s download site is undergoing restructuring, this cartridge is not included in the older listing referenced on this web page)
    50 BMG (pg. 117 - link above)
SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) (home) cartridge and chamber drawings - click associated cartridge link (above):
    338 Excalibur
    338-378 Weatherby
    338 Lapua Magnum (“pending” status, no drawings)
    375 Remington Ultra Magnum
    378 Weatherby
    
* Per Lapua’s website, the 338 LM’s muzzle energy is 4938 (max factory load).
 ** Chamber reamer drawings courtesy of Mr. Dave Kiff, Pacific Tool and Gauge. NOTE: The 416 Barrett drawing included in the drawing package is for the OLD case (therefore removed from that listing, above).  Do NOT use it if you are using new brass/chamber.  The NEW drawing is proprietary and was generated approximately in late September 2012.  The OLD drawing was not removed from the set because that PDF is one document, not separate pages. Proceed with caution - see the “General footnote”, above.
 *** Additional drawings (courtesy of Dave at CH4D) - see cautionary “General footnote”, above.
 **** Provided courtesy of Mr. Jimmie Sloan, the developer of the 338 Norma Magnum. Please note that the publication of the formal CIP document is still in process.
               ELR Resources
Products
    Rifles
    Rifle Components
    Ammo & Ammo
Components
    Reloading Equipment
    Miscellaneous
Services
    Gunsmiths
    Ranges
    Retailers/E-tailers
    Training
Information
    Cartridges
    Associations and Clubs
    Information Sites and Forums
    Legal
    Pubs, Articles, and Photos
News