I have been offered half a barrel off a .58 caliber rifle. I think I will take them up on the offer and repeat the test. How about you people on the forum decide what powder you want tested, and how you want it tested and we will then run this test again. Also think about how you want the barrel stored. I can store it inside the house where it is warm and dry, or in a shop where it is cold damp and humid, or in a garage where it is cold and dry. After getting some feed back, I will re test powders. I have a large selection of powders to choose from... So you people decide how you want a real barrel tested.