Starline Brass Star357MEUP1 Unprimed Cases 357 Magnum 100/Pack Basically a lengthened Version Of The .38 Special, The 357 Magnum Is One Of The Most Popular Handgun Calibers In The World. Almost Every Revolver Manufacturer makes a Firearm In This chambering. Also Used In Many Lever Action Carbines. 357 Magnum Brass. Type: Unprimed Case Material: Brass Style: Small Length: 1.275"-1.285" Gun Type: Pistol Metal Type: Brass Caliber Or Gauge: 357 Magnum Quantity: 100 Per Bag Recommended Usage: Reloading