Winchester 270 Calibre (.277) 130Gr Power Point Rifle Bullets. Bullets are custom-designed and manufactured to precise specifications to deliver specific on-target performance characteristics. These characteristics vary depending on bullet design. Winchester carries a variety of component bullets for both centerfire, rifle, and handgun ammunition. Specifications Caliber: 270 Caliber (.277") Weight: 130 Grains Bullet Style: Power Point Box Count: 100 Bullets