About 1 year ago I came on the forum looking for advice in building a 4 bore caplock, today I finally proof tested it. The standard charge I will use in this monster is a 4oz projectile, and 14 drams (385grs) of powder. The proof load consisted of a 6.6oz projectile, and 550 grains of 3f Goex. Here are some pictures, The first is of a .22 pellet container with the charge in it, the container is approximately 2.5" in diameter and 7/8" deep. The second is of the hollow based projectile I cast from a mold I made, still haven't perfected it yet. The next two are of the setup I had to fire it, I set the cap off with a party sparkler. The next show the penetration into the frozen block of poplar it shot into, and the projectile after. The mold was cold when I cast the bullet, so it wasn't as solid as it could have been. The piece on the left was the front, and the piece on the right was the rear. In the future I will heat my mold up for better fill out, I was just being lazy when I cast this one. The shot https://www.youtube.com/watch?v=P9Uw...ature=youtu.be The aftermath https://www.youtube.com/watch?v=SLuX...ature=youtu.be