***An update on the IMR powder from my use...........
For me clean burning and pleasant feel to the loads. Cases seem to seal well even in lower charges and come out clean. Nice amount of case volume fill in 45's. Metering for me in my Lee Perfect Powder Measure is not making me comfortable, I will get .2 to .4 swings which does not make me comfortable even though I load midrange and have the room the consistency is not appealing. But it may be time for a better powder measure too, always been thinking about the RCBS and maybe the new Lee Deluxe Perfect Powder Measure?