Greetings all,
Ammo manufacturers do not use canister grade powders like you and I. Canister powders are selected and blended so that the speed of each lot is close to all others of the same powder. Manufacturers use bulk lots where the speed can vary more widely. The manufacturers test each lot and vary the charge to produce the same velocity or close to it. Consequently powder from manufactured cartridges will not be anything we have ever heard of and trying to identify it is a fools errand.
GPM.
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