Traveling at 900 fps, well below the speed of sound, our Hush Puppy® 147 gr. FMJ load is a soft-shooting, mild-recoil alternative to full-power 9mm ball. The IPSC power factor is 132, ideal for competition. The brass is headstamped HUSH PUPPY and it comes in our distinctive "yellow box" in a traditional 50-count package. Because it is a soft-shooting load, the 147 gr. Hush Puppy may not cycle suppressed pistols reliably with the factory recoil spring; a reduced-power recoil spring may be necessary. All Smith & Wesson M&P pistols from our sister company, the Hush Puppy Project, are shipped with a reduced-power recoil spring (as well as the original factory spring) for this very reason.