Extreme on predators. Varmint X ammunition is specifically designed to meet the demands of predator and Varmint hunters. Varmint X rifle ammunition is designed specifically with sleek, polymer-tipped bullets that are explosive on impact. Varmint X combines the proven lethality Winchester is known for with today's latest technology, giving hunters their ammunition of choice for pursuing everything from prairie dogs to coyotes. The polymer tip maximizes long-range performance and promotes rapid expansion. The thin, alloy jacket with engineered sidewall profile allows for explosive fragmentation.