I just did 100 rounds of 45 ACP @ 4.8 gr of unique and only a few didn't throw 4.8 gr on the first try. I think my charge bar is set to .635 cc.
I have also metered as low as 4.3gr of unique consistently with the adjustable charge bar. I guess I'm just lucky.
I use the regular auto-disk with pro conversion kit.
Veteran OEF (2002) and OIF1 (2003) - US Army
Member of the Burnet Gun Fighters, Inc
. and of course the NRA
Oregon State University alum -- Go Beavs!