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Rifles, Reloading, Optics, Equipment
Reloading
Case trim length
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<blockquote data-quote="RD57" data-source="post: 2622621" data-attributes="member: 103010"><p>I trim to .003" less than chamber length. When I started reloading at 13 years of age with my Dad I trimmed to the recommended in the manuals. When I entered the military I took some of the 5.56 brass from the range to measure out chamber size and compare it to my 1976 Mini-14 fired brass. I thought military brass was crap, it was all over the place from 1.755" - 1.771". Then using the unit armorer's bore scope with a fired piece of brass in the chamber I saw that there was still a little bit of room in the neck for a little more neck length. It was a "lightbulb moment" for me, so now I trim my brass for the particular rifle it gets shot in, I let it grow until it needs trimming and it only gets trimmed a few thousands under. It does help keep the carbon fouling out of the neck area and it gives you more bullet grip for short necked rounds like the .223/5.56, .243, etc. SAAMI chamber dimension diagrams will give you an idea of what to expect.</p></blockquote><p></p>
[QUOTE="RD57, post: 2622621, member: 103010"] I trim to .003" less than chamber length. When I started reloading at 13 years of age with my Dad I trimmed to the recommended in the manuals. When I entered the military I took some of the 5.56 brass from the range to measure out chamber size and compare it to my 1976 Mini-14 fired brass. I thought military brass was crap, it was all over the place from 1.755" - 1.771". Then using the unit armorer's bore scope with a fired piece of brass in the chamber I saw that there was still a little bit of room in the neck for a little more neck length. It was a "lightbulb moment" for me, so now I trim my brass for the particular rifle it gets shot in, I let it grow until it needs trimming and it only gets trimmed a few thousands under. It does help keep the carbon fouling out of the neck area and it gives you more bullet grip for short necked rounds like the .223/5.56, .243, etc. SAAMI chamber dimension diagrams will give you an idea of what to expect. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case trim length
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