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Rifles, Reloading, Optics, Equipment
Reloading
Thoughts on mixing powder lots?
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<blockquote data-quote="J E Custom" data-source="post: 1257709" data-attributes="member: 2736"><p>There are lots of reasons people blend different lots But I wont/dont because of the inconsistencies due to poor blending.</p><p></p><p>To get a good blend you have to mix and mix and mix with no guarantee that an equal amount of each powder is present in your case. and if you mix/tumble to much you will remove the coating that helps control burn rate and damage the grains.</p><p></p><p>It is a simple process going from one batch to another with out mixing/blending. while you are loading make notes (Number the cases)of the last full case you loaded,. then number/identify the first case with the new batch of powder and test the two different powders to see if there are changes and make any adjustments if there are to the new batch to match you other load.</p><p></p><p>This way, you not only follow the manufactures recommendation, all future loads will have the same performance because the new batch has not been blended and possibly damaged.</p><p></p><p>I have bought many 8# kegs of powder to minimize the batch/lot difference and found that even then the load would change over time due to the powder degrading from opening and closing the keg. So I started opening the keg once to pore it in 1# containers and only opening them as I need them to keep the powder fresh. Another practice that the powder manufacture do not recommend is placing a desiccent pouch in with the powder because it will change the moisture content of the powder and change the burn rate. It is a good idea to place them in the storage cabinet to minimize moisture and corrosion of the container lids.</p><p></p><p>I do have some first hand experience with mixing different lots and also loading duplex loads. nothing good ever came of ether process so I stoped doing both.</p><p></p><p>This information is not intended to start a debate and most people will do what they want to. It is just my experiences of over 50 years of reloading and hopefully this advice will keep someone out of trouble.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1257709, member: 2736"] There are lots of reasons people blend different lots But I wont/dont because of the inconsistencies due to poor blending. To get a good blend you have to mix and mix and mix with no guarantee that an equal amount of each powder is present in your case. and if you mix/tumble to much you will remove the coating that helps control burn rate and damage the grains. It is a simple process going from one batch to another with out mixing/blending. while you are loading make notes (Number the cases)of the last full case you loaded,. then number/identify the first case with the new batch of powder and test the two different powders to see if there are changes and make any adjustments if there are to the new batch to match you other load. This way, you not only follow the manufactures recommendation, all future loads will have the same performance because the new batch has not been blended and possibly damaged. I have bought many 8# kegs of powder to minimize the batch/lot difference and found that even then the load would change over time due to the powder degrading from opening and closing the keg. So I started opening the keg once to pore it in 1# containers and only opening them as I need them to keep the powder fresh. Another practice that the powder manufacture do not recommend is placing a desiccent pouch in with the powder because it will change the moisture content of the powder and change the burn rate. It is a good idea to place them in the storage cabinet to minimize moisture and corrosion of the container lids. I do have some first hand experience with mixing different lots and also loading duplex loads. nothing good ever came of ether process so I stoped doing both. This information is not intended to start a debate and most people will do what they want to. It is just my experiences of over 50 years of reloading and hopefully this advice will keep someone out of trouble. J E CUSTOM [/QUOTE]
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Thoughts on mixing powder lots?
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