X-Treme Bullets 10mm/40 S&W Caliber Pistol Bullets 200 Grain RNFP HPCB 500 Bullets. 429 in Core Material: Lead Jacket Material: Copper Bullet Quantity: 500 Bullet Package Contents: X-Treme Bullets 10mm/40 S&W Caliber Pistol Bullets 200 Grain RNFP HPCB X-Treme Bullets 10mm/40 S&W Caliber Pistol Bullets 200 Grain RNFP HPCB 500 Bullets