The flat trajectory, the additional 25 yards over .22 WMR, very little sail effect from wind, and the same effectiveness as the .22 WMR have sold me. The round is on the verge of being approved for coyote, too.
Rimfire can be fun. The prices will come down when the market expands. It's still too new for a big market. The "secret" will spread soon enough.
Guys would you mind taking the arms discussions to email please? Don't get upset, it is just very predominant ;)