Winchester Super-X Super Speed Rimfire Ammunition is a variation of the standard Winchester Super-X ammunition, with one option being a .22 LR 37-grain hollow point bullet. This particular option has a muzzle velocity of 1,330 feet per second due to the 135 foot- pounds of muzzle energy.
 
Caliber - .22 Long Rifle
Bullet Weight - 37 Gr. HP
Package Quantity - 100 rds.