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Rifles, Reloading, Optics, Equipment
Reloading
Similar burn rate
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<blockquote data-quote="Bullet bumper" data-source="post: 842458" data-attributes="member: 17844"><p>If you have a cartridge with no published load data then you have to find a similar cartridge with similar case volume and calibre and use that load data reducing the starting loads by another 10 % . </p><p>These are the powders that are close to Ramshot Magnum but it's only a rough guide .</p><p> </p><p> </p><p><span style="font-family: 'Arial'"><span style="font-size: 10px">145. Hodgdon H1000</span></span></p><p><span style="font-size: 10px"><span style="font-family: 'Arial'">146. Ramshot Magnum</span></span></p><p><span style="font-size: 10px"><span style="font-family: 'Arial'">147. Alliant RL25</span></span></p><p><span style="font-size: 10px"><span style="font-family: 'Arial'">148. Hodgdon Retumbo</span></span></p><p> </p><p>If you look at the Hodgdon data for a cartridge very close to what you have and bullet weight that uses Retumbo and match that against what you are already loading with Ramshot Magnum . Then a good comparison should emerge . Reduce that by 10% anyway and you should not be in trouble as Retumbo is a bit slower anyway.</p><p>The reason that greatly reduced loads can suddenly speed up is the amount of Oxygen inside the case and the fact that the small amount of powder is spread out more and the primer can set more off instantly. </p><p>I don't think a 10% reduction of a recommended load is excessive I have done it before so I can't see a problem</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 842458, member: 17844"] If you have a cartridge with no published load data then you have to find a similar cartridge with similar case volume and calibre and use that load data reducing the starting loads by another 10 % . These are the powders that are close to Ramshot Magnum but it's only a rough guide . [FONT=Arial][SIZE=2]145. Hodgdon H1000[/SIZE][/FONT] [SIZE=2][FONT=Arial]146. Ramshot Magnum[/FONT][/SIZE] [SIZE=2][FONT=Arial]147. Alliant RL25[/FONT][/SIZE] [SIZE=2][FONT=Arial]148. Hodgdon Retumbo[/FONT][/SIZE] If you look at the Hodgdon data for a cartridge very close to what you have and bullet weight that uses Retumbo and match that against what you are already loading with Ramshot Magnum . Then a good comparison should emerge . Reduce that by 10% anyway and you should not be in trouble as Retumbo is a bit slower anyway. The reason that greatly reduced loads can suddenly speed up is the amount of Oxygen inside the case and the fact that the small amount of powder is spread out more and the primer can set more off instantly. I don't think a 10% reduction of a recommended load is excessive I have done it before so I can't see a problem [/QUOTE]
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Similar burn rate
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