12.7x44

[rudybolla]

Is this a true carbine (M77 Cavalry or M85 Artillery) or a cut down sporter? Pics please.

[rudybolla]

You seem to have a Husqvarna M67 military musket cut down into a sporter. Very common. Generally good shooters with some work. A rule of thumb with black powder is to fill the case to a point where seating bullet to depth compresses powder about 1/8". So depending on cases and bullets, the powder charge may vary by a few grains from what I use in mine.

[rudybolla]

I would do both chamber and bore casts with Cerrosafe, if you can get some. That will tell you what bullet diameter to use. The REAL bulets are used by some folks. I use a .510-.512 (depending on rifle) bullet ranging from 300 to 450 grains. For brass, the most economical and most common is to use cases made from .348 Winchester brass. Buffalo Arms sells these and they are less spendy than the Dixie .50-70. I have never had a problem with them.