(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. 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. (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 they are virtually the same name, and from the same reamer company, but the dims are different enough to present VERY SERIOUS problems if assumed interchangeable - at least for the 375/50 where they are NOT! Proceed with caution!!!