There are many different 9mm cartridges in the world, but not all of them use bullets of .355 inch diameter. Be sure that the handgun cartridge for which you are loading uses .355 inch diameter bullets. The exterior of JHP bullets is completely covered by jacket, including the nose radius, for total reliability. Sierras 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 125 grain #8125 bullets brings its excellent qualities to the larger 9mm cartridges, such as the 9mm Luger (919 mm), 921 mm, 357 Sig, and 38 Super. These bullets are effective in the varmint fields and have gained great favor with many law enforcement agencies. Additionally, many top handgunners use 125 grain bullets for their accuracy and reliability in target competitions. These bullets are truly exceptional in all respects.