Mixing BP granulations & even good brands

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mdeland
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Re: Mixing BP granulations & even good brands

Post by mdeland » Mon Apr 05, 2021 8:41 pm

Apparently fines are produced after the powder is sieved (screened) and canned, from handling because of additional grain fracture. It could also be linked to static suspension I suppose, as well. I would think any amount of powder mixing that could be an effective means of even distribution of grain size(which does effect burn rate) would produce more grain fracture hence more fines.
It has not been my experience, on a per can basis ,that the fines remain suspended for very long with any movement. I have noted that Goex has more fines per can than does Swiss.
Course once loaded compression will stop any separation.

TexasMac
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Re: Mixing BP granulations & even good brands

Post by TexasMac » Mon Apr 05, 2021 10:52 pm

mdeland wrote:
Mon Apr 05, 2021 8:41 pm
Apparently fines are produced after the powder is sieved (screened) and canned, from handling because of additional grain fracture. It could also be linked to static suspension I suppose, as well. I would think any amount of powder mixing that could be an effective means of even distribution of grain size(which does effect burn rate) would produce more grain fracture hence more fines.
It has not been my experience, on a per can basis ,that the fines remain suspended for very long with any movement. I have noted that Goex has more fines per can than does Swiss.
Course once loaded compression will stop any separation.
Mike,

I agree with all your comments including that Goex has more fines than Swiss which may or may not be true now but certainly was a few years ago when I was using it. I even built a powered tumbler type screening device using a BBQ motor to turn the powder & separate the fines. It's definitely not needed with Swiss. As to how much I created in the mixing process, I just don't have any idea. It likely wasn't much since I was gentle. :D

Wayne
NRA Life (Benefactor & President's Council) Member, TSRA Life Member, NSSF Member, Author & Publisher of the Browning BPCR book
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Glen Ring
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Re: Mixing BP granulations & even good brands

Post by Glen Ring » Tue Apr 06, 2021 6:27 am

Thanks for Posting this. It's a topic I've always wondered about.
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Woody
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Re: Mixing BP granulations & even good brands

Post by Woody » Tue Apr 06, 2021 7:52 pm

Wayne,

There are a lot of things that I have done and am willing to do in my 69 years, but mixing several pounds plus of black powder is not one of them. Go for it if that is your thing, but I will not and do not advocate this. It's not the assumption that it may stretch your powder supply, it's the fact that when several pounds decide to say "Hello", it's too late to decide that this was a bad idea.

Woody
Richard A. Wood
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Kurt
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Re: Mixing BP granulations & even good brands

Post by Kurt » Tue Apr 06, 2021 8:31 pm

I have some mixed in a coffee can. :D

But it's spilled and junk powder, Diamond back, some Goex, Swiss, OE, KIK from 3F to 1 F and all in-between :D
But I use it for blowing the shoulders out for the .44-90 bn and the .44-77 with the .44 Bell basic brass or just busting bowling pins. :D
I put some holes through a few targets and that mix did quite well :lol:
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TexasMac
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Re: Mixing BP granulations & even good brands

Post by TexasMac » Tue Apr 06, 2021 9:02 pm

Woody wrote:
Tue Apr 06, 2021 7:52 pm
Wayne,
There are a lot of things that I have done and am willing to do in my 69 years, but mixing several pounds plus of black powder is not one of them. Go for it if that is your thing, but I will not and do not advocate this. It's not the assumption that it may stretch your powder supply, it's the fact that when several pounds decide to say "Hello", it's too late to decide that this was a bad idea.
Woody
Woody,

Due to the precautions I take I figure I have a better chance of dying in an accident on the way to a match than blowing myself up. At the current rate I use powder 45lbs should last 3 years give or take. Approaching my mid 70"s means that if I'm lucky & can shoot for many more years, I'll only have to mix up 5 more batches of so. But if I forget to use metal pots and grab a plastic 5-gal bucket it may indicate it's my time to go anyway. And if I can make it to 90, going out with a BANG doesn't sound like a bad way to "kick the bucket". :lol:

BTW, as a precaution, the mixing is done in my workshop, separated by a good distance from the house - I wouldn't want to "take out", so to speak, my better half & our pooch if a mishap was to happen.

Wayne
NRA Life (Benefactor & President's Council) Member, TSRA Life Member, NSSF Member, Author & Publisher of the Browning BPCR book
http://www.texas-mac.com

mdeland
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Re: Mixing BP granulations & even good brands

Post by mdeland » Wed Apr 07, 2021 11:38 am

Yeah and you'll likely have your boots on when the "big" light comes on! :lol:

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