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 over 15 rounds. Out of my 16” CZ 455 PT in 40 degree temps it averaged 1027 with a high of 1038 and a low of 1012. I will try to shoot some groups at 25, 50 and 100 soon. So far I am impressed though.