Miwest powders

i have bought tons of the stuff. None since they changed the "naming" system and added the burn rate chart.
Having said that, it usually appeared to be what they said the powder was. It might be faster or slower than what you expect; like a failed QC because it was outside the bounds of the +/- spec the sell the "name brand" as. Start low and work up.
 
Haven't used a ton but so far so good. I've had similar experiences with speed as deer_hunter132 but one particular powder, haven't seen it in a year or so, is giving considerably higher speed than expected.
 
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