I run CCI Subsonic in my 10/22 and have shot it in my 22/45 also. Both cycle fine. Bulk pack is fine for a suppressed pistol, but you are right that you will want subs for a rifle.
CCI green tag is also subsonic, but it is another expensive match ammo.
When you say "CCI subsonic" do you mean CCI "Quiet", "Standard" or just all of their subsonic offerings?