[4runnerman]

This is a old one that keeps coming up. If you have 4 one lb containers of the same powder and different lots. Go ahead and mix them all together and uniform it. All you have done is uniform 4 lbs of powder. You will need to do your load work up all over again,but most of the time if not all the time you will end up back at your same load any how. You now have 4 lbs of powder that will shoot the same instead of 4 one lb containers that will need 4 seperate load work ups.