Im am seriously thinking of attempting to make a mold for my Coehorn replica. I dont want it to be like a round ball, but rather shaped like a shotgun slug, with a hollow base to reduce weight and possibly stabilize it somewhat. The bore is sized to shoot pop cans at .2.625.
As it is, it'll shoot a concrete filled pop can about 200 yards with 250 grains of 2f.
Does anyone here have an experience with manufacturing a hollow based mold ?
Im sure I could eventually figure it out, but I rather use the mistakes of others as a learning experience.
Here's a picture. The base is made of oak and the tube is 4140 and is half scale.