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Rifles, Reloading, Optics, Equipment
Reloading
Is it practical to underload a 300 rum?
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<blockquote data-quote="Barrelnut" data-source="post: 1161271" data-attributes="member: 74902"><p>Yea, it can vary a little more than you might expect sometimes. Different bullets, even of the same weight, have different external dimensions. Lots of times it is the bearing surface length that can affect pressures. Also the brass used can affect the published loads. For the example, Nosler brass is thicker than some other 300 RUM brass. So it has less internal capacity and uses less powder to reach the same pressure. That may be why the Nosler book list a lower load. Another strange fact is that the Berger manual is published results from a program called Quickload. It is a highly requarded program though. It is speculation, but if you look at the Berger manual, they don't list the brass or primers used during load development. Welcome to reloading.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="Barrelnut, post: 1161271, member: 74902"] Yea, it can vary a little more than you might expect sometimes. Different bullets, even of the same weight, have different external dimensions. Lots of times it is the bearing surface length that can affect pressures. Also the brass used can affect the published loads. For the example, Nosler brass is thicker than some other 300 RUM brass. So it has less internal capacity and uses less powder to reach the same pressure. That may be why the Nosler book list a lower load. Another strange fact is that the Berger manual is published results from a program called Quickload. It is a highly requarded program though. It is speculation, but if you look at the Berger manual, they don't list the brass or primers used during load development. Welcome to reloading.:D [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is it practical to underload a 300 rum?
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