Super Vel's "Certified Select" Training Ammo is re-manufactured with once-fired brass casings that are loaded on the very same machines and with the same components (other than the brass case) as our premium "yellow box" line. Our 147 gr. FMJ bullet travels at 900 fps which is subsonic (the speed of sound is 1,150 fps, approximately). Ideal for training or competition, this Hush Puppy load yields an IPSC power factor of 132 and is low recoil. Shooting a suppressed pistol with the 147 gr. FMJ Hush Puppy may require a reduced-power recoil spring for reliable cycling. We also offer a 158 gr. FMJ Hush Puppy load with a stiffer recoil impulse which does not require a reduced-power recoil spring to function with a suppressor.