I was able to get my hands on some Prime Ammo 22 subsonic Ammo, their good stuff for accuracy. I took it out and hooked up my Magnetospeed v3 and put 10 rds over it and it came out to around an SD of 7.5ish, I was surprised so I ran 5 more over it and the SD went down to 6.4 with and ES of 26...