I know just enough to be dangerous but had a buddy came over today and brought a .32 Caliber Squirrel Rifle Replica and a .31 Caliber 1849 Colt Pocket Replica. Lot of fun shooting them. The fact that the .32 Rifle takes .310 Balls and the .31 Revolver takes.320 Balls seemed a little strange. He forgot his powder measure for the rifle but he had a 22 Hornet Case he used for the pistol and just used two (He said that was basically a target load) for the rifle and the revolver got one (He said that was close to Max). I'm thinking he said the case held 14 gr. I think the powder was fffg but I'm not positive. He noticed I had a bunch of milk jugs and we.got to talking and decided to run and impromptu penetration test. A .380 will usually go through two water jugs and once in while into the third so to be safe we set up four jugs.... The test was a complete failure, if someone finds that ball let us know. Complete pass through on all four jugs! I only had 6 jugs left so we decided to set them all up.... Rifle this time. When you find that pistol ball look around and see if you can find the rifle ball too. Complete pass through on all six jugs! Sure gives me a new appreciation for what those little bitty smoke poles and pocket caliber cap and ball revolvers could do.