My 1968 copy of Gun Digest shows the 22 short to shoot 29 gr bullets at 1045 fps (or 1125 fps high velocity), the long shows the same 29 gr bullets at 1240 fps.
The long rifle 40gr bullet at 1245 fps while the 37gr hollow points are at 1365 fps. These figures are for Remington, Winchester and Federal ammo.