need help with 58 minie bullet mold

[Surrywoodman]

Hey all,
I just bought a 58 cal Zoave that I will be using with Minie balls. I went searching and Lee Precision has several sizes specked for the 58. Does anyone know what the best size mold for the Zoave would be, or what your experience has been? They have three near as I can tell, two 575s and a 578 for the 58cal. Want to be able to hunt with it as well as do N-SSA competition

 

[Grenadier1758]

@Surrywoodman, I can't tell you. Your Zouave is the source for determining the size of the Minie' ball you need. Bore diameter of the lands varies quite a bit between manufacturers. The bore must be measured. That can be quite the trick with the three groove barrels of many of the reproductions. Using the inside tips of a vernier caliper measure the diameter from the lands to the bottom of the groove on all three flats. Since these are round barrels, measure from the land to the outside of the barrel for all three lands. Do the same for the grooves. Subtract the average of the three groove measurements from the average of the three land measurements. Now you have the groove depth. Subtract the groove depth from the average of the three land to groove measurements to get the land-to-land bore diameter. Buy a mold that is 0.001" to 0.002" smaller than the land-to-land diameter. You may want a larger diameter mold and an exact diameter sizer sleeve to form your Minie' balls.

If you have one of the Zouaves with a 0.580" bore none of the molds you found will work. Maybe @dave951 will chime in.

 

[Surrywoodman]

I forgot to mention, it is an Antonio Zoli, sold by Navy Arms originally, and that might not make any difference, I don't have it yet, it is in transit

 

[nkbj]

Hey Surry,
If you don't have a set of pin gauges...
The easiest way I've found to determine the needed minie diameter is to obtain some minies of various diameters. Check for fit by carefully inserting them into the muzzle while the barrel is laying flat on a table. The minie that will just barely go in is the diameter to try first for load development.
Another way is to obtain some that are larger than the bore diameter and to hold the barrel vertical, like between your legs while sitting in a chair. Then, with a good set of channel locks holding the nose of the minie, insert its tail into the rifling while rotating the barrel against the base of the minie. In effect you're using the lands of the rifling to machine down the outside diameter of the soft lead. After boogering up a few and getting the hang of it you can make a few more to check with calipers or mic's and figure out the diameter you want to start loading with. If the minies on hand are too small to start with you can stand them up and bang the noses with a hammer to make the skirts fatter.

Another method of course is put one wrap of thin paper around a slightly too small minie to make it big enough to shoot accurately. That's a trick I first read about here on the forum many years ago.

 

[springfield art]

I forgot to mention, it is an Antonio Zoli, sold by Navy Arms originally, and that might not make any difference, I don't have it yet, it is in transit

A pal just won an older Zoli at raffle. Guys on local black powder range are coaching her on it; a woman with a Zouave! Does that make her a vivandierre?

 

[Surrywoodman]

I don't have pin gauges but I do have calipers, and...I do think I get get my hands on some minies of a few different diameters prior to buying a mould.