Thanks guys. Gaschecks aren't getting any cheaper and they seem tyo go fast so thats good to know.
No I suppose I'll load some identical loads with and without checks to compare the accuracy with. I have two gc moulds in 44, a Lee 250 SWC and the Lyman 300 gc. I also have the 245 Keith plain base and the 180 WC. 44's are such a great caliber to load for.