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Rifles, Reloading, Optics, Equipment
Reloading
Chamber length and brass, to trim or not to trim, that is the question.
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<blockquote data-quote="earl1704" data-source="post: 2240455" data-attributes="member: 8946"><p>Given; 300 Win Mag, factory rifle, no modifications.</p><p>Reload; Nosler brass, Hornady 110gr V-Max, H 4350, 76.8 gr. Federal 215 primer</p><p>Primer pockets uniformed, flash hole deburred, annealed every 2 shots, full length </p><p>resizing, chamfer inside and out of necks, before loading I use an expander </p><p>die to uniform necks and use a brush in drill to 'clean' inside of the necks. </p><p>I do NOT sort brass by weight. </p><p></p><p>Measured chamber length is 2.6495 (Sinclair chamber plug)</p><p>Brass fired upwards of 5 or 6 times (or more).</p><p>Longest brass 2.6445</p><p>Shortest brass 2.6240</p><p>Book trim to, 2.610</p><p></p><p>I general do not trim brass thinking it will grow to near my chamber length, where </p><p>I would trim back about 3k for uniformity. However my brass is so un-uniform in length I must </p><p>(I think) trim to something else, its just not going to get there. The question is what length for max accuracy? Do I just take a guess? Is there a rule? I cant send 100's of rounds to test every length with the cost and availability of</p><p>components being the problem it is at this time. </p><p>I have found when my brass does get to the 2.64XX area the necks tend to split. </p><p>This will be a wolf hunting round, currently shoots well to 500 yds., 1 MOA, but I do get fliers.</p><p>SD 39.3 (need to do much better)</p><p>Low 3632 fps</p><p>High 3741 fps</p><p>Extreme spread 109 fps</p><p></p><p>Do I need to rethink brass, load or anything else to get the SD down? </p><p>Any other thoughts? Trying to find a better way of thinking or looking at this.</p><p></p><p>Thanks ...........Earl</p></blockquote><p></p>
[QUOTE="earl1704, post: 2240455, member: 8946"] Given; 300 Win Mag, factory rifle, no modifications. Reload; Nosler brass, Hornady 110gr V-Max, H 4350, 76.8 gr. Federal 215 primer Primer pockets uniformed, flash hole deburred, annealed every 2 shots, full length resizing, chamfer inside and out of necks, before loading I use an expander die to uniform necks and use a brush in drill to 'clean' inside of the necks. I do NOT sort brass by weight. Measured chamber length is 2.6495 (Sinclair chamber plug) Brass fired upwards of 5 or 6 times (or more). Longest brass 2.6445 Shortest brass 2.6240 Book trim to, 2.610 I general do not trim brass thinking it will grow to near my chamber length, where I would trim back about 3k for uniformity. However my brass is so un-uniform in length I must (I think) trim to something else, its just not going to get there. The question is what length for max accuracy? Do I just take a guess? Is there a rule? I cant send 100's of rounds to test every length with the cost and availability of components being the problem it is at this time. I have found when my brass does get to the 2.64XX area the necks tend to split. This will be a wolf hunting round, currently shoots well to 500 yds., 1 MOA, but I do get fliers. SD 39.3 (need to do much better) Low 3632 fps High 3741 fps Extreme spread 109 fps Do I need to rethink brass, load or anything else to get the SD down? Any other thoughts? Trying to find a better way of thinking or looking at this. Thanks ...........Earl [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Chamber length and brass, to trim or not to trim, that is the question.
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