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Hot Topic (More than 10 Replies) Sifting BP- a shock (Read 2071 times)
CW
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Re: Sifting BP- a shock
Reply #15 - Oct 13th, 2023 at 12:09am
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I don't know anything officially, but it does not appear there are any industry standards that the different makers adhere to. I have screens. Swiss, GOEX, Schuetzen, KIK, Elephant... There is no standard for, say FFg.   I think each company grades their product to their own standards. 
Many of the lesser priced product has multi sizes in there FFg.   Even Swiss FFg is a mix of 1.5Fg and 2Fg
There is way too much FFFFg in the old KIK and the old and hard to find Elephant.   Also, when screening out the FFFFg and fines from graphite coated powder you will find that a lot of the fines are really graphite.
-Just a FWIW Roll Eyes
  
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KaiserKong
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Re: Sifting BP- a shock
Reply #16 - Oct 13th, 2023 at 2:42am
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The U.S. Department of Defence does have a spec for black powder:
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If you look at page 10, it shows a nice graph of the mesh size (U.S. standard sieve size) for the type of range. I need to find my notes, but when I compared these mesh size from this table to what is often quoted for mesh size in various reloading and other manuals they don't seem to match up.

So there is a standard, but no one adheres to it. But then again, why would the Swiss adhere to a U.S. standard when they've been making powder far longer than us?  Grin
  
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CW
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Re: Sifting BP- a shock
Reply #17 - Oct 13th, 2023 at 3:56pm
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Thanks for posting the link. I agree with you.

And, Your last point being the operative one.
  
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