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The nipples do allright, maybe 200 shots. I have a few left made by the fellow who made the molds and tools but am running low.

I tried platinum lined nipples with the platinum threaded, pressed in and staked but they all failed: the platinum eventually disappeared. The ones that are most durable for me are made of heat treated stainless steel though I don't know what alloy.
 
No, 977 grains 1 piece pure lead bullet is the lightest I use. I have molds and swage for a 2 piece bullet that weighs almost 1300 grains but it is more work to make and shoots no better.
 

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Here's a little tidbit of info that some folks don't know about. When these rifles were put together and machined by the Old Masters....so as to have the lands of the barrel match exactly the lands within the false muzzle.....the barrels were either made or ordered extra long and cut off at the length desired or either the false muzzle portion was machined separately and then prior to the barrel being rifled the false muzzle was clamped onto the barrel and then the entire apparatus was rifled! Perfection as near as possible was the desired result! And the bullets were two piece and swaged together with the rear portion being slightly softer than the front portion!
 
Here's a little tidbit of info that some folks don't know about. When these rifles were put together and machined by the Old Masters....so as to have the lands of the barrel match exactly the lands within the false muzzle.....the barrels were either made or ordered extra long and cut off at the length desired or either the false muzzle portion was machined separately and then prior to the barrel being rifled the false muzzle was clamped onto the barrel and then the entire apparatus was rifled! Perfection as near as possible was the desired result! And the bullets were two piece and swaged together with the rear portion being slightly softer than the front portion!
You are correct sir.
 
Uncle Miltie, what's your rifling geometry look like? Lands and grooves of equal width, or one smaller than the other? How many grooves for the length of bullet perimeter? Approximate depth of rifling? Sides of the grooves slanted a little? Rounded corners down in the grooves or sharp corners?
 
18 lands and grooves, approximately 0.0025" deep. Never measured the width of the lands and grooves but the grooves appear to be slightly wider. Rifling angles, sharp /round edges I have not measured.

The bore is choked, beginning about 4" down from the muzzle. The bullet is 1.575" in length and 0.552" in diameter at the base.

I use an oiled paper patch of about 0.0025" inches which likely bulks up to 0.003" after oiling.

The patched bullet rides on top of the lands while loading. Once the guide (piston) starter gets the bullet past the choke I can finish loading it with the pressure of one finger: it's that easy.
 
Many thanks for sharing your Slug Rilfe experience with us. There's way too little written about them, and the false muzzle photos are great. I like the milled slots.for paper-strip cross patch. Do you use any sort of lube wad or card wad between bullet and powder, or does the 'tween-shot cleaning make that moot?
 
Cleaning between shots makes fouling sort of a non issue I suppose. When I began shooting this rifle I used a lubricated felt wad between the bullet and powder to protect the base of the bullet from hot gases caused by the conflagration of all that powder. One day I left the wads at home, shot the rifle anyway and found accuracy to be better without the wads. I haven't used them since.
 

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