I love them so much! Totally smitten. I'm so biased at this point nobody should take my word for it. The difference in going from an 18.13gr JSB pellet at 920fps 34fpe, to the KO 20.83gr at 980fps 44fpe, is staggeringly more than just the 10fpe difference would seem to indicate. At 200y the pellet is doing 441fps 7.8fpe, the slug is doing 705fps 23fpe. A totally different animal. It is so much more fun to shoot, it's like back when I started moving up from springers. The only Halo I care about at this point is the one on the late founder of JSB's head. He earned it, to me.