450A-

No worries here.
About 95% of the time I ask for this specific ball size I get the 'yes here are some .600 (or .610 or whatever) they have for however they'd load a fusil for ball.

Really, I'd love to find someone with .620/.625/.630/.635... so I could experiment around the range of sizes.

I just got off the phone with Track earlier and ordered some .648" ball (I think it was listed at .645 but they said I'd be getting .648") which I'll push though a bullet swage (likely just a plate or die I'll make on the lathe) to get them to groove diameter, then run them though my cannelure tool and grease, then back through the plate.
I'm not sure how much bearing surface this'll get me (hopefully not a huge amount), but since at this point I'm still having trouble standing for a very long period of time I'll just call this a good starting point.
I could make a mould here, but the time on my feet in the machine shop would be torture.

That and I still need to make brass for this rifle...

--Tinker