Handloader 56 July 1975

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Depending upon the brass alloy, cartridge design, type of loads being used, and the amount they are worked by reloading dies, they require frequent shortening to stay within the maximum chamber length. If a case "grows" beyond chamber length, the mouth is crimped against the bullet, affecting both pressure and accuracy. The trimming task is made many times easier by fast equipment such as this Lyman Universal case trimmer, which uses a chuck head that accepts all metallic rifle or pistol cases, such as these,340 Weatherby cases.