At this point, I attribute the misfires (I think there were two out of 30 rounds in the match) to an EXTREMELY hour-glassed mainspring. 

I know you guys already know this, but Hi-Tec coatings do absolutely nothing for Black Powder shooters.  Shooting BP you gotta have enough BP compatible lube.  Hi-Tec is acceptable though, iff your shooting APP.

I'll try to give you more about the Missouri Bullet Co.s Hi-tech coated.

You can see the Red Hi Tech coated on the right in the photo above size to .313" dia.

Here is the Marlin
Dads Smith & Wesson Hand Ejector
and my Colt

The 32 WCF (32/20) is a cartridge near and dear to me.
It was the first round of any power beyond 22 short and LR, I got the shoot as 9-year-old kid.

It was my Dads S&W Hand ejector circa 1926, I still have it and load a cast LEE 93 grain .(311  311-93-1R)
It is however not the bullet for your 73.

I have a Circa 1891 Mod 73, for it I use the BP Big Lube Bullets from Springfield Slim.  These are a little heavier at 115 grains and mic at .313.
Sadly, Springfield Slim is no longer casting, however I purchased a supply when he was.
I also have a cache' of Missouri Bullet Co.s Hi-tech coated.

I also have a Colt SAA in 32/20 and a Marlin Classic. 



                                                                                                                                               

So a dear friend was given an 1873 in .32 caliber today, manufactured in 1885. She may not be shootable without lining, cleaning will tell. Very straight and unaltered, looks like it’s never been refinished or overcleaned. But, there’s a lot of pitting on the exterior of the barrel and mag tube near the muzzle- scares me, but we haven’t cleaned the bore yet.

If we have to get it lined, we will. My advice to my friend, which I think he will take, is to leave the gun alone other than that and a thorough cleaning that leaves the patina intact . Anyhow, we definitely want to shoot her- so now I need to get a mold, brass, and dies. I am strictly using Swiss powder, and only interested in replicating the original late 1880s loading. Any pointers on loads, and especially a mold? Does Accurate already have a design for an original style bullet? I know the late John Kort had played with the .32WCF in addition to the .44WCF, but I don’t know anything beyond that. The Accurate 31-110C looks very much like John’s .44 design, and the 31-110L looks like maybe a good two-groove design. I’d prefer to get as close to the original bullet as I possibly can. Thanks in advance!