Features Include: PROVEN GMX® BULLETS- Monolithic copper alloy GMX® bullet provides uniform, controlled expansion, deep penetration and +95% weight retention. SEALED PRIMER AND CASE MOUTH- Sealed primer and case mouth provide watertight protection. WATERPROOFED CASES- Nickel-plated cases are corrosion resistant and waterproofed to ensure protection from moisture. VERSATILE PERFORMANCE- California compatible and appropriate for other areas requiring nontraditional bullets.