Sierra bullets, in partnership with Sig Sauer, presents a top-tier line of defense bullets crafted for superior weight retention and expansion at all effective distances, while upholding Sierra esteemed accuracy. This line features a stacked hollow point bullet design with an extra hollow point cavity. A locking groove is included to guarantee controlled expansion and sustain high weight retention. The new No. 9947 147GR JHP is a heavyweight bullet specifically designed to reach subsonic speeds in cartridges like the 9x19 (9mm Luger), making it an excellent option for use with SBR-style firearms.