Bulk ammo is really a phrase accustomed to get ammunition in packing containers or cases. Buying ammo in bulk is a great way to preserve your time & cash on your favorite ammo. Bulk ammunition is often from the case and box packaging. Bulk ammo is commonly out there in common calibers for instance 9mm, 5.56mm, .40 S&W, .forty five ACP, and .223/5.5