I'm not a fan of overpaying for ammo of any sort but I'm in need of some subsonic ammo and the other one I've been able to find recently is Norma .22 ammo at $0.11 PPR before shipping. Its rated at 1100 (subsonic) but isn't the speed of sound 1100fps? So its barely subsonic which I'm not sure if it'll break the barrier out of a rifle. Is this good ammo or should I continue to look out for CCI?