Simple truth...
Mixing powder is exactly what the factories do. That is how they achieve "canister burn rate." Then there are coatings that also effect burn rate. Col Nonte, in one of his books, describes the process. When the machine is turned on, they have no exact idea what the powder that comes out will be. Sure, they know if it will be stick or ball or flake or ??? but they hold back lots that are near the burn rate they sell as "XXX" powder and blend them to be within acceptability. This is why you will hear all the complaining that the new can or powder just isn't the same as the old, empty can and the sale of 8 lbers.
You? If you go to the Hodgdon web site they can give you more data for any cartridge than you will use in a lifetime. With the shoulder, I am guessing that 7.62x25 might want a trifle slower powder for hottest velocity but no reason you cannot use a reduced load for acceptable performance.
As said, without a ballistics lab to regulate your results (and the safety equipment) DON'T unless you are tired of living. Luck. Happy Trails.
Mixing powder is exactly what the factories do. That is how they achieve "canister burn rate." Then there are coatings that also effect burn rate. Col Nonte, in one of his books, describes the process. When the machine is turned on, they have no exact idea what the powder that comes out will be. Sure, they know if it will be stick or ball or flake or ??? but they hold back lots that are near the burn rate they sell as "XXX" powder and blend them to be within acceptability. This is why you will hear all the complaining that the new can or powder just isn't the same as the old, empty can and the sale of 8 lbers.
You? If you go to the Hodgdon web site they can give you more data for any cartridge than you will use in a lifetime. With the shoulder, I am guessing that 7.62x25 might want a trifle slower powder for hottest velocity but no reason you cannot use a reduced load for acceptable performance.
As said, without a ballistics lab to regulate your results (and the safety equipment) DON'T unless you are tired of living. Luck. Happy Trails.
