These bullets were designed and introduced for Handgun Metallic Silhouette. This competition, which requires toppling heavy steel targets. A heavy bullet is necessary to provide the momentum required to knock these targets over. Sierra introduced the 170 grain #8350 Full Metal Jacket bullet in 1978 to give shooters a high ballistic coefficient bullet with sufficient weight to reliably score on rams at 200 meters, as well as other targets at shorter ranges. The cannelure is located to give the proper overall length and crimp for all revolvers chambering these cartridges. These bullets are non-expanding and suitable for all cartridges from 38 Special to 35 Remington in revolvers, single shot pistols and rifles.