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Rifles, Reloading, Optics, Equipment
Reloading
How to know what powder is used in a manufactured cartridge
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<blockquote data-quote="blitzfike" data-source="post: 1890002" data-attributes="member: 94525"><p>Several years back, I was able to buy some powder in quantity that came from St. Marks Powder Company. It was made to sell to one of the major companies and they rejected it. A gentleman who deals in Large Quantities of surplus (both military and commercial) powders bought the entire lot. We were given what he thought was the starting info for the powder and told to go safely and sin no more... er develop out own loads. It was reportedly close to one of the newer anti copper fouling powders. Being an old and cautious loader, I dropped about twenty percent back and made some 308 loads. The first one down the pipe resulted in more recoil than I was used to along with a case with a stretched primer pocket and brass flowing around the bolt face. This was fired in one of the AR-10 style rifles. Thank goodness for a strong action. I immediately stopped, pulled all the loads and re-weighed the charges, finding them all on the money. I contacted the vendor and told him not to use that data as a starting point and went back to the drawing board. Taking one of my stronger bolt actions, I went back thirty percent and started working back up. I found a sweet spot about 26 percent below his starting point, then using the tables found a powder that matched the velocity pretty closely for the charge weight and used that as a starting point for developing loads for other calibers. The canister designation was WC-842 and was Not from military pulldown stuff. I bought quickload after that and now model most of my new stuff before ever stuffing the first cartridge. This is how some of the more strange powders end up on the market.</p></blockquote><p></p>
[QUOTE="blitzfike, post: 1890002, member: 94525"] Several years back, I was able to buy some powder in quantity that came from St. Marks Powder Company. It was made to sell to one of the major companies and they rejected it. A gentleman who deals in Large Quantities of surplus (both military and commercial) powders bought the entire lot. We were given what he thought was the starting info for the powder and told to go safely and sin no more... er develop out own loads. It was reportedly close to one of the newer anti copper fouling powders. Being an old and cautious loader, I dropped about twenty percent back and made some 308 loads. The first one down the pipe resulted in more recoil than I was used to along with a case with a stretched primer pocket and brass flowing around the bolt face. This was fired in one of the AR-10 style rifles. Thank goodness for a strong action. I immediately stopped, pulled all the loads and re-weighed the charges, finding them all on the money. I contacted the vendor and told him not to use that data as a starting point and went back to the drawing board. Taking one of my stronger bolt actions, I went back thirty percent and started working back up. I found a sweet spot about 26 percent below his starting point, then using the tables found a powder that matched the velocity pretty closely for the charge weight and used that as a starting point for developing loads for other calibers. The canister designation was WC-842 and was Not from military pulldown stuff. I bought quickload after that and now model most of my new stuff before ever stuffing the first cartridge. This is how some of the more strange powders end up on the market. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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How to know what powder is used in a manufactured cartridge
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