I've seen some of that REALLY high priced .22 online, but never tried any.All the yellow and white box Aquila I've shot has been subsonic. Coincidentally it's all I use in my Mossberg 44US trainers and it is the best of about 15 types/manufacturers I've tried (including Eley Club, Match, Ten-X, Remington Match, Federal Match [garbage by the way], Lapua, Gecco, etc.,).
I figure it's overkill for the type of shooting I do. All I'm doing is sitting in a hay field plinking at a steel target. LOL Aguila is fine for that.
I run the bulk pack junk through an AR22 upper on my SBR lower. It's got a 4.5" barrel so the bulk pack ammo stays subsonic out of it.
It's fun to shoot close range, but I won't be winning any distance contests with it.