No Fear in Accuracy
Well-Known Member
With a little research you can generally limit your loads to about two powders in a caliber. I always go to the temperature insensitive first. I keep 8 lb jugs of varget h4198 h4350 H1000 H4831SC IMR 4166 and now RL17 and 26. I have smaller lots of lesser powders that are not my mainstays. I have a metal powder locker for powder and primers.
If you are working up a load for a gun that is going to be shot a lot it is important to keep the same lot. Changing lots requires shooting the new lot over a chrono to check speed and tune.
QL cannot account for lot variance until you go in and make manual adjustment but it is a research tool.
I wondered if the store ordered a truck load of powders from the manufactories, does it mean that the powders are the same lots? (meaning that they create powders and shipped on the same day).