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Rifles, Reloading, Optics, Equipment
Reloading
Brass Trimming problems
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<blockquote data-quote="boomtube" data-source="post: 237754" data-attributes="member: 9215"><p>"I am using a Lyman manual trimmer. All of the primers were removed for the trimming and for the measurements. I am using remington brass. Does case length usually vary this much? Does the length of the case matter if there is no crimp on the bullets?"</p><p> </p><p>First, length is only "critical" for maintaining consistant crimps. Well, wiithin rational limits. Don't cut off a quarter inch.</p><p> </p><p>A length spread of .010" is "normal" for rifle cases.</p><p> </p><p>I too have Lyman trimmers, both the "Universal" and "AccuTrimmer". With the Univerasal, my lengths are very consistant IF I don't quit turning too soon. The AccuTrimmer is somewhat more variable because it indexs off the front edge of the rim, making finished length dependant on the thickness of the rim. </p><p> </p><p>Those trimmers that use "draw-in" collets see lengths vary somewhat due to differences in the actual diameter of each rim and how tight the user turns the locking handle. </p><p> </p><p>Only the Lyman Universal and Willson trimmers, as far as I know, index the case heads on a solid steel stop so lengths actually can be consistant if the user is careful.</p></blockquote><p></p>
[QUOTE="boomtube, post: 237754, member: 9215"] "I am using a Lyman manual trimmer. All of the primers were removed for the trimming and for the measurements. I am using remington brass. Does case length usually vary this much? Does the length of the case matter if there is no crimp on the bullets?" First, length is only "critical" for maintaining consistant crimps. Well, wiithin rational limits. Don't cut off a quarter inch. A length spread of .010" is "normal" for rifle cases. I too have Lyman trimmers, both the "Universal" and "AccuTrimmer". With the Univerasal, my lengths are very consistant IF I don't quit turning too soon. The AccuTrimmer is somewhat more variable because it indexs off the front edge of the rim, making finished length dependant on the thickness of the rim. Those trimmers that use "draw-in" collets see lengths vary somewhat due to differences in the actual diameter of each rim and how tight the user turns the locking handle. Only the Lyman Universal and Willson trimmers, as far as I know, index the case heads on a solid steel stop so lengths actually can be consistant if the user is careful. [/QUOTE]
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Brass Trimming problems
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