There are many different 9mm cartridges in the world, but not all of them use bullets of 0.355 inches diameter. Be sure that the handgun cartridge for which you are loading uses 0.355 inches diameter bullets. The 115 grain #8110 bullets were originally introduced in the hollow cavity (JHC) design in 1970, but the design was changed in 1983 to the current hollow point (JHP) to enhance feeding in semi-auto pistols. The exterior of JHP bullets is completely covered by jacket, including the nose radius, for total reliability. Sierra's power jacket with skives enhances expansion in varmints at handgun velocities. Pure lead is used for the core to give good penetration with excellent expansion. The 115 grain #8110 bullets brings it's excellent qualities to the larger 9mm cartridges, such as the 9mm Luger (9x19 mm), 9x21 mm, 357 Sig, and 38 Super. Additionally, many top hand gunners use the 115 grain bullets for their accuracy and reliability in target competitions. These bullets are truly exceptional in all respects.