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I slugged the barrels and they are .775 at the muzzle.
I melted down some black gold lube and soaked my fiber wads in it.
To little powder? more is better?
Ball not real tight in the case, but not sloppy loose.
No other cases fit the chambers, I have tried,
Should I be using pure lead, will it bump up or swage if it needs to/
Should I try and change the primer to a 209 style?

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I assume this is groove dia. with what bore dia.?

Yes - more powder in a light, rifled choke gun - likely more in the 10 bore shotshell range - 4 to 4 1/2 drams, which is 110gr. to 123gr.

Pure lead is more likely to obturate than ANY other mix.

The Lyman BP Gold is a good BP lube, worked for me in ctg. as well as for bullets in a long barreled flint lock rifle.

Good suggestions on the new brass by the guys, however I'd likely try the small rifle magnum primers first, if the brass you have is OK.

I would not think the brass is set for Berdan primers (CENTRAL PEG + 2 side HOLES) or perhaps they were changed, by being drilled out and cups lined like some .577/450 brass I found a long time ago. It's gone now - gave it to someone 30 years ago.

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Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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