Seems like it really likes heavier slugs. I have not had any luck with anything under 70 grains. The 80s were flying at 950. Getting 11 shots per fill. First 4 shots were under a half inch and that was my first time shooting the 80s on paper, and I thought I really had something special for a minute. Still incredibly excited about this guns potential, or I guess I can say now proven ability. If this is as good as it gets I’m 100 satisfied with that.