I will actually be shooting a nitro for black load in the gun. That is once I fire it with black to get a velocity reading for the gun. I already have a good lube. I make it from a mixture of bees wax Vaseline and peanut oil. Works great guns clean easy and dos'nt seem to matter weather its smokeless or black powder. I am thinking about a 1-44 twist and a 625 to 650 bullet.