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Paul B. · September 28, 2000, 03:00 PM

Well, I don't mix different lots of powders as some have quite different burning rates. I have run into this with IMR-4831. I have one batch that is in the same rate as IMR-4350. I have to use 4350 data, as the IMR-4831 data is too hot.
I would agree, that if you are in the middle or lower range of the loads for your gun, that when the old batch runs out, just continue with what load you were using. If you are at maximum or close to it, drop back a bit and work back up. You won'y use that much powder and handgun loads use very little, and it beats having a possible KABOOM.
Paul B.

September 28, 2000, 03:00 PM	#9
Paul B. Senior Member Join Date: March 28, 1999 Location: Tucson, AZ Posts: 3,802	Well, I don't mix different lots of powders as some have quite different burning rates. I have run into this with IMR-4831. I have one batch that is in the same rate as IMR-4350. I have to use 4350 data, as the IMR-4831 data is too hot. I would agree, that if you are in the middle or lower range of the loads for your gun, that when the old batch runs out, just continue with what load you were using. If you are at maximum or close to it, drop back a bit and work back up. You won'y use that much powder and handgun loads use very little, and it beats having a possible KABOOM. Paul B.