Another BP comparison
Pulp
June 17, 2008, 06:36 PM
.44-40, 200 grain bullet, Uberti SAA, 4 3/4 inch barrel
GoexFFFg 2.5cc, 750fps
GoexFFFg 2.2cc, 720fps
PyrodexRS, 2.2cc, 850fps
777 FFg, 2.2cc, 850fps
Homemade, 2.5cc, 250fps.
I think I mighta done something wrong on this batch, ya reckon.:) Not really sure, but I might have overcooked the charcoal. Anyway, I burned the rest of it, in a mighty flash of smoke, gonna start some more over the week-end.
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Smokin_Gun
June 17, 2008, 09:08 PM
Does #cc stand for shots of Canadian Club?
I couldn't help it, I don't have my conversion chart up.
SG
Redd Flynt
June 18, 2008, 03:50 PM
Could just be a density thing. Do you compress the powder or just wet screen it?
sundance44s
June 19, 2008, 06:08 AM
Thats why I don`t try to make my own powder ...better luck next time.
Pulp
June 19, 2008, 05:27 PM
RedFlynt, I just wet screen it. I've been tryin' to figger out a way to compress it some (other than by seating a bullet) and haven't really come up with anything yet. I'm thinkin' on putting the wetted powder into a length of PVC pipe with a cap on one end with a small hole drilled through the cap, then finding a dowel rod that will just fit into the pipe and trying that for compression.
Any other ideas would be appreciated.
By the way, the first powder I made gave me 1000+fps out of a .44 cap and ball, but only around 500 out of the .44-40.
alemonkey
June 19, 2008, 08:02 PM
Just curious, what kind of wood do you use to make the charcoal? I'd like to try my hand at making my own, but I need to track down a source of charcoal. I think my dad has some willow trees on his land, IIRC.
Voodoochile
June 19, 2008, 09:21 PM
Willow or Alder would be the best source for charcoal.
My problem in manufacturing my own is having the facility to do it without my lil ones possibly getting into it or worse.
Redd Flynt
June 20, 2008, 01:58 PM
Pulp;
Sounds like your powder is OK, just not dense enough. Wet screened powder probably has a density of about 1.2 give or take. Wet pressing will give a much higher density. I press mine at 3,000 psi and get 1.7 density.
Charcoal is perhaps 90% of the whole process. Over cooking is a source of poor performance. The wood is important but most wood will still work, just don't over cook it. I limit my temperature to 350 C by use of a good thermometer. Charcoal is NOT pure carbon, it contains hydrogen and trace amounts of other elements.
That's about it.
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