If you're meaning blending lots of the same powder I've done it with 2208.
Had almost finished loading with one batch then blended the next batch into a larger container and continued loading.
Over time the loading container had more and more of the new lot and less of the old.
Worked for me, didn't have to rework loads.
Another time I loaded and tested an "older" batch of 2208 against the "newer" batch.
24 rounds of each batch. Fired 10 shots with 2 sighters are 300 yards and 500 yards.
There was not statistical difference is speed or accuracy between the batches.
As 2208 is a powder ADI is almost always manufacturing I figured that ADI's quality control manages the mix to get consistency.
That's my theory anyway.
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