Doubletap Ammunition 9MM+P 147Gr Full Metal Jacket Round Nose 20 Round Box. This ammunition is a popular chambering for competitors in the action shooting sports including International Practical Shooting Confederation (IPSC) matches and will increase the bullet energy by 10-percent to standard non +P 9MM Luger ammunition. This ammunition is non-corrosive boxer primed in reloadable brass cases. Specifications for Doubletap Ammunition 9MM+P 147Gr Full Metal Jacket Round Nose 20 Round Box: Manufacturer: Doubletap Ammunition Caliber: 9mm Luger Number of Rounds: 20 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 147 grain Features of Doubletap Ammunition 9MM+P 147Gr Full Metal Jacket Round Nose 20 Round Box: 9MM +P Package Contents: Doubletap Ammunition 9MM+P 147Gr Full Metal Jacket Round Nose 20 Round Box