Here's the deal.
I bought an 1892 clone made back in the 1920's originally chambered for 44 WCF (.44-40) called a Tigre. It has been a fun project. Firing pin was broke, ejector bent, pins bent, no rear sights, barrel shortened, screws missing, rusty, beat up and rechambered to something unknown.
I slugged the barrel (.429"), made a cast of the chamber and determined the chamber was reamed out for .44 mag. The bore is in very good shape but the chamber is a little sloppy.
The barrel and magazine tube had been shortened to 20" to make it a carbine. Thus the rear dove tail (7/16" dovetail) was too close to the receiver to put the rear sight back on and the barrel/magazine tube bands no longer fit. They changed the forearm to a carbine style but nothing fit together properly.
I did extensive work to the whole thing getting everything to fit and function properly.
To make a long story short, I finished it up and test fired it Sunday using Black Hills Cowboy Ammunition .44 S&W SPCL 210 FPL. Low and behold it worked fine except for what I would consider excessive blow by around the cartridge which I think using longer brass (.44 mag) would help correct.
I don't want to shoot magnum loads as I'm not that brave a soul.
So, my question is.........What would be a good load for .44 mag brass that would duplicate the Black Hills Cowboy Ammunition .44 S&W SPCL 210 FPL?