I have a bunch of Chinese surplus 7.62x54r ammo and it occurred to me that the bullets might shoot well in my SMLE. If I pull some of these down is there any way I can reuse the powder in the enfield as well? I weighed the charges from 5 pulled rounds and they averaged 45 gr. If I had a chronograph I could find the velocity and compare to similar powders with that charge. Unfortunately I don"t have a chronograph. I know I'll need to reduce the charge and work up but I'm just not sure how much? Any suggestions?