Jason Arms is your number one source for 40 Cal ammo. We offer new and remanufactured bulk 40 S&W ammo at the lowest prices.40 S&W Ammo ; $390.00. 39.0¢ per round. 36 · Ammo Manufacturer – Military Ballistics Industries; Bullets – 180 grain plated flat point ; $380.00. 42.2¢ per round