Gun: CVA Optima Pro (old style hex breech plug, unmodified, but with a thin washer in the primer hole to eliminate gap between primer and firing pin plate)
Mold: Lee 250g 50 cal REAL dual cavity. Scrubbed clean with Dawn dishwasher detergent and hot water, smoked (now I know I don't need to do this) and all soot wiped away in cavity with Q-Tip.
Metal: Dead soft lead (can make an impression in the bullets with my thumbnail) cast at 750F from Lee 4-20 bottom pour pot. With the hotter than normal temperature, the lead fills out the mold nicely with nice sharp edges and no wrinkles.
Attachment 118267
Lubed with 2:1 Beeswax/Vaseline. Consistency of Chapstick but does not melt off even in 110F weather.
Attachment 118269
Charge 45-90g (by volume) Alliant BlackMZ. Not the best powder around, but 1/2 the cost of what I've found to be the best (Blackhorn 209).
Overpowder card made from cardboard cereal box and punched with sharpened 1/2" steel pipe.
After the powder and card are loaded, push down real hard with the ramrod.
Although Lee claims you can push the REAL's down with just a ramrod, I used a homemade short started and mallet to start the bullet in the rifle, then the ramrod to push it the rest of the way down and be sure you seat the bullet firmly against the card/powder.
Results at 50 yards.
Right now I am plinking with 45g (volume) of BlackMZ. It is about as accurate as the 70g load, but costs less per shot.
There are 2 tricks to getting consistent shots with this very coarse, irregular powder.
- Loosely pour the powder into the measure and level off the top without shaking or letting the powder settle.
- Clean between each shot. Both sides of a dry cotton patch (cut up T-shirt) is sufficient. The powder leaves white "crusties" in the breech region which will make seating of subsequent shots inconsistent.
Attachment 118277
A clean up of the barrel consists of a patch soaked in CLP followed by a couple of dry patches. No leading and no build up even after 20+ shot sessions. Be sure to clean the breechplug too.
Hope this helps.