I've cast some bullets with my LEE 452-255gr RF DC mould. I want to know if this bullet can be fired using Black Powder. This bullet has two lube grooves but they are narrow and shallow. If I use SPG lube and size to .452" will they work in my Ruger NV 5.5" barrel? I have no doubt they'll work with smokeless powder, I want to try them with BP. I cast them with Rotometals 20:1 alloy and they came out of the mould at .4532" says my micrometer and weigh ~261.3 +- 2grains. The alloy was very hot +800* during the casting session. Ladle poured from my LEE Pro 4-20 furnace.