Winchester Varmint X RIFLE .223 Remington 40 grain Rapid Expansion Polymer Tip Centerfire Rifle Ammo 20 Rounds. The tipped bullet effectively fuses with the Varmint X exclusive alloy resulting in powerful velocities and explosive fragmentation. Varmint X is a specialized .223 Remington cartridge whose specialized propellant provides the power needed for long-range shooting. The purpose of this ammunition is to deliver the same explosive fragmentation that Varmint X is famous for using all across Winchester specialty brands. This 223 Remington round has a thin engineered jacket with an engineered sidewall profile which allows the high-performance lead core to achieve rapid fragmentation. The combination of these two materials has provided Winchester with a product with the ability to reach out to greater venomous species. Specifications for Winchester Varmint X RIFLE .223 Remington 40 grain Rapid Expansion Polymer Tip Centerfire Rifle Ammunition: Manufacturer: Winchester Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Rapid Expansion Polymer Tip (REPT) Bullet Weight: 40 grain Cartridge Case Material: Brass Muzzle Velocity: 3600 ft/s Muzzle Energy: 1151 ft-lbs Application: Varmint Package Type: Box Primer Style: Centerfire Lead Free: No Gun Type: Rifle Features of Winchester VARMINT X RIFLE .223 Remington 40 grain Rapid Expansion Polymer Tip Centerfire Rifle Ammunition: Polymer TipMaximizes long range performance and promotes rapid expansion Alloy JacketThin jacket with engineered sidewall profile for explosive fragmentation Lead CoreDesigned for rapid fragmentation Package Contents: Winchester VARMINT X RIFLE .223 Remington 40 grain Rapid Expansion Polymer Tip Centerfire Rifle Ammunition What is Winchester Varmint X RIFLE .223 Remington 40 grain Rapid Expansion Polymer Tip Centerfire Rifle Ammunition good for? The manufacturer suggests that it is best for varmint.Winchester X223P1: Varmint X Rifle Ammo .223 Remington Rapid Expansion Polymer Tip 40 grain 20 Rounds