Information - Cartridges [ELR-class w/ min 338 LM’s muzzle energy*] (note #)
Cartridges Matrix (23 Aug 2017)- comparative; separate tabs for 338, 375, and >.375; changes since last update in light green.
        NOTE: This file is in xls format. A FREE reader is available
here. The contents were compiled from designer’s websites, wikis, and elsewhere and calculation of “Supersonic to Yds” were made using JBM’s trajectories calculator.

Individual cartridges:
33 Nosler (including partial drawing), SAAMI (pg. 126)
338-378 Weatherby, wiki
338 Allen Magnum
338 Allen Xpress
338 Big Baer
338 Edge (and 338 Edge +P), wiki, chamber reamer drawing (2)
338 Edge MK II (see post #20 in this LRH thread)
338 Excalibur, chamber reamer drawing (2)
338 Jarrett
338 Lapua Magnum, wiki, CIP, SAAMI (pg. 128), chamber reamer drawing (2), chamber reamer drawing from Caina-Longbranch Defense Systems, Canada, specifically for use with 300 gr SMKs, i.e., the CLB reamer
338 Little Dave (8.5 x 55), from Austria (site is in German, Bing translator here)
338 Norma Magnum, wiki, CIP, article (review), chamber reamer drawing - CIP minimum material (2), chamber reamer drawing (Jimmie Sloan/338 Norma Magnum USA) - CIP maximum material (4)
338 SnipeTac, chamber reamer drawing, 300 gr (2)
338 Terminator
8.59 (.338) Titan (Lazzeroni), chamber reamer drawing, case drawing (6)
338 Yogi (Dave Tooley) - TooleyRifle at
338 Xtreme (additional info and pic and also)
375/416, chamber reamer drawing (2)
375/50 BMG, chamber reamer drawing (5)
375/50 JGS, chamber reamer drawing (3)
375 Allen Magnum
375 Allen Xpress
375 CheyTac (9.5x77 - CIP proposal) - also see 408 CheyTac wiki, chamber reamer drawing (2), drawing (3)
375 Hubel Express/HE - public domain design; cases, dies, and reamers available; reamer drawing; contact 585he at
375 Lethal Magnum
375 Mercenary - reamers, brass, and dies available; contact merc375 at
375 Remington Ultra Magnum (RUM), wiki, SAAMI (pg. 144)
9.53 (.375) Saturn (Lazzeroni), chamber reamer drawing (6)
9.5x70 ELR/9.5x70 Tornado
375 SnipeTac, chamber reamer drawing (2)
375 Viersco Magnum (VM2) also (7)
378 Weatherby, wiki
408 CheyTac (10.36x77 - CIP proposal) - wiki, CIP, also, chamber reamer drawing (2), drawing #1, #2 (3)
416 Barrett, wiki, also (7)
416 TYR (10.6x80, Grillmayer) (7)
416 Viersco Magnum (7)
458 Viersco Magnum (a variant of the 416 Viersco Magnum)
460 Steyr, CIP, also (7), chamber reamer drawing (2)
20/50 Anzio (call Anzio)
50/20mm (M-103) PAC-NOR, chamber reamer drawing (5)
50 BMG (12.7x99mm NATO), wiki, CIP, also (7), drawing (3)
50 DTC Europ (Danis), chamber reamer drawing (3)
50 Fat Mac (7)
50 Vulcan, drawing (3)
510 Allen Magnum
510 DTC Europ (50 DTC), GunWiki, wiki, CIP, also (7), chamber reamer drawing (2)
12.7 mm. M48-A1 Spotter (7)
12.7x108mm (Russian), wiki, also (7)
14.5x114mm (Russian) wiki, also (7), chamber reamer drawing, (2)
14.9x102mm SOP
20x102mm (Vulcan +), wiki, also (7)
20x110mm (Hispano-Suiza +), wiki, also (7)

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 between chamber reamer drawings. 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); ELR cartridge and chamber drawings - click associated link (above):
   338 Lapua Magnum
   338 Norma Magnum
   408 CheyTac
   460 Steyr
   50 BMG
   510 DTC

SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) - cartridge and chamber drawings - click associated cartridge link (above):
   33 Nosler
   338 Lapua Magnum
   375 Remington Ultra Magnum
   NOTE: The previously-listed Weatherby .338-.378 and .378 are not in the current document.
CH4D cartridge (caliber) list - use the shell holder # search to find wildcats and variants that MAY fit the same bolt face.

(1) Per Lapua’s website, the 338 LM’s muzzle energy is 4938 (max factory load).
(2) Chamber reamer drawings courtesy of Mr. Dave Kiff, Pacific Tool and Gauge.
(3) Additional drawings (courtesy of Dave at CH4D) - see cautionary “General footnote”, above.
(4) Provided courtesy of Mr. Jimmie Sloan, the developer of the 338 Norma Magnum.
(5) Drawings contributed by PAC-NOR. NOTE that some cartridges may have the same or virtually the same name, and be from the same reamer company, but the dims may be different enough to present VERY SERIOUS problems if assumed interchangeable, e.g., 375/50. Proceed with caution!!!
(6) Chamber reamer and case drawings courtesy of the designer, John Lazzeroni, Lazzeroni Arms
(7) Association of Spanish Cartridge Collectors (AECC) - site is in Spanish, Bing translator here; on their home page, click the third link from the top in the left side menu, “Fuego Central / CF” to find links to groups of centerfire cartridges, click each to expand to links for info on individual cartridges.

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