One for MB , Vics vapour rub

[Midnitemo]

With the sound barrier you either need to be below it or you need to exceed it by a fair margin or accuracy is compromised , .22lr subs are made in most cases to achieve 1065 fps non subsonic factory ammo is usually around 1250 fps , never seen any ammo quoted between these figures I'm lead to believe on poor accuracy grounds
I would expect pellets to be the same.