Powder

[steve883]

Hi all

I have been trying to find out how much BP weighs, and have so far drawn a blank, so thought I'd ask you lot.

I have just bought a reproduction Colt Walker .44, and learn from various loading sources that it needs a maximum charge of 40grains BP.

I am using Pyrodex P, which should (I'm sure you'll know) be measured out at at the same volume as 40gr BP. I have a powder flask which has an unknown volume, (though I have previously used it with a .36 BP pistol), and enough engineering ability to make my own measure for it.

So what I need to know is, what is the volume of 40 grains of BP, and/ or what is the volume or weight of Pyrodex P which correlates to that?

Any takers?

Steve

[lilguy43uk]

I have just bought a reproduction Colt Walker .44, and learn from various loading sources that it needs a maximum charge of 40grains BP.

I can't help you on the weight/volume question but I think you might find 40gn of BP (or equivalent) a bit too much to handle. I am happy with 23gn so far but am still working a load up using .454 balls and felt patches.

[steve883]

how big is your measure for 23grain? Are you using BP or Pyrodex?

What I really need to do is buy a BP measure and go from there!!

[Simon G]

Steve,

A 40gn spout will cost you about 3 quid in a local gunshop....

[DJS]

One grain of FFG blackpowder is 0.068 cc
one grain of FFFG blackpowder is 0.0628 cc
one grain of pyrodex p is 0.0823 cc

40 grains of FFFG blackpowder is 2.512 cc and the same volume of pyrodex p is 30.5 grains.
Daz

[steve883]

Thanks for that guys.

My local gunshop has no BP stuff at all, and getting them to order stuff takes a while, so I'll just make my own, it'll be quicker!

Thanks again!

[Smokeless Coal]

Volumetric conversion was dealt with here

http://www.airgunbbs.com/forums/showthread.php?t=196729

[lilguy43uk]

how big is your measure for 23grain? Are you using BP or Pyrodex?

What I really need to do is buy a BP measure and go from there!!

Using the spout on the powder flask but got varying results so I invested in a powder measure, weighed the powder and set the measure to it. I also use 35mm film tubs and put pre-measured loads into them before I go to the range. Saves time when there.

[Chocchip]

I threw 10 charges with my flask with a 30gr spout and then weighed each charge to see what the difference was. I typically got all to the same weight withing 0.1gr - quite surprising how accurate it can be.

My 30gr by volume spout holds 20.5gr by weight of H777 Fffg