Norma .270 Winchester Short Magnum 140 Grain Rapid Expansion Polymer Tip Brass Cased Rifle Ammo 20 Rounds. 270 Winchester Short Magnum is a modernization of the .270 Winchester offering more velocity and energy for the same bullet weights fired and thus flatter trajectories. The 270 WSM being a short action cartridge is popular among mountaineous hunters who tend to like lighter rifles and ammunition to carry around while mostly encountering medium game at distances and angles that require fine ballistics. Specifications for Norma .270 Winchester Short Magnum 140 Grain Rapid Expansion Polymer Tip (REPT) Brass Cased Rifle Ammunition: Manufacturer: Norma Caliber: .270 Winchester Short Magnum Number of Rounds: 20 Bullet Type: Rapid Expansion Polymer Tip (REPT) Bullet Weight: 140 grain Cartridge Case Material: Brass Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Norma .270 Winchester Short Magnum 140 Grain Rapid Expansion Polymer Tip (REPT) Brass Cased Rifle Ammunition What is Norma .270 Winchester Short Magnum 140 Grain Rapid Expansion Polymer Tip (REPT) Brass Cased Rifle Ammunition good for? The manufacturer suggests that it is good for hunting.