Powder Granulation

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rodwha

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I want to stock/carry one powder for my arms, which so far are a .45 cal ROA with a 7.5" barrel, and a Lyman's .50 cal percussion Deerstalker (24" barrel).

For my pistol, and using RB's to 255 grn bullets, and up to a max charge (45 grns for RB's to ~30-35 grns with a 255 grn bullet) for hunting, I have been using 3F Triple 7. I want a good bit of horsepower as this may very well be used to track a wounded hog, or, given an opportunity, a black bear, in which I'd be using a 200-255 grn bullet.

After talking with an older gent with lots of experience I was told I should use 2F in my rifle, which always gave him better accuracy.

I'm buying a pound of Olde Eynsford to try out BP to possibly replace the use of T7.

I certainly want the best accuracy I can get, though I'd be willing to sacrifice a little bit if we are talking about the difference being 2.5" groups with 2F vs 3.5" groups using 3F if it means I get a substantial difference in my pistol, especially if I find, as most seem to, that I get much better accuracy with a less than max load in my pistol, which could mean the difference between a bullet completely penetrating or not (I like the idea of complete passthroughs if possible).

Would a full charge (45 grns) with a RB and 7.5" of barrel likely blow unburnt powder using 2F?

And what would the likely loss of velocity be between 2F and 3?

Have others noticed much better accuracy using 2F over 3 in a .50 cal rifle with a shorter barrel (28" or less)?
 
The right granulation is going to be determined by your particular firearm. His may have gave the best accuracy with a given powder at a certain number of grains and yours may be completely different. The difference may be insignificant or large.
Only way to know is to do a little trial and error.
 
I figured I'd begin with 3F, and if happy enough, I'm done.

He made me consider trying 2F instead, but I decided I'll try 3F. But I was curious as to whether or not this is a common occurrence.
 
I have 2F through 4F but use 3F the most. With a long-barreled .50 caliber rifle, 2FG will probably be the best choice. 3FG would be best for a C&B revolver.

What's wrong with "matching the hatch"?
 
I'm not familiar with "matching the hatch", but I'm gonna guess that it's matching each to their best option...

I want to be able to load my one flask with powder to use in both my rifle and pistol.

And it just makes things a little easier.
 
If you're going with the Olde Eysnford, I would think that 2f would fit the best for a one powder does it all. I shot some of the 2f in a 38-40 bisley copy with a 4 1/2 inch barrel and got excellent velocity and accuracy, another fella uses it in a 45 colt, so I would imagine your roa will get along fine with it.
The same guy that's been shooting the 2f Olde E in his colt has been shooting it in a 54 flintlock and getting about 150 fps more velocity than regular goex for the same charge thrown with a volume measure.
 
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