The polymer tip of the V-Max bullet is the key to its dramatic accuracy and devastating expansion. The copper jacket is designed to work with the tip to deliver incredible accuracy at long range, and it assists the dramatic expansion of the V-Max bullets. The copper jacket provides the necessary bearing surface for maximum in-flight stability. Inside the barrel, the jacket is built to withstand the faster twist rates of manay of today's advanced varmint rifles. It all means the bullet will hold together until impact.