I've used both powders and between the two I would say that Clays is slightly cleaner than American Select. However I liked American Select better for metering and performance. Both powders should be cleaner than 700X.i am using 700x for trap shooting, burns dirty, does anyone use a different powder, that burns cleaner? in a Remington 1100 or a 11-87. I am thinking of American select or clays. any info would help. thanks