Introducing Wolf Polyformance Steel Case 300 AAC Blackout Ammo 145 Grain Full Metal Jacket. This ammunition features a bi-metal bullet and steel case to provide an inexpensive option for high volume shooters. The Bi-Metal bullet consists of a lead core and a copper plated steel jacket. This affordable ammunition is loaded with high quality Wolf primers for reliable ignition and functioning in adverse conditions. The thin polymer coating helps to ensure smooth feeding and extraction. This ammunition is new production, non-corrosive, in non-reloadable steel cases. FeaturesPolyFormance coating ensures smooth feeding and extractionReliable ignition and functioning in adverse conditionsSave money with high-quality, economical loads