HSM Ammunition Starline Rifle Brass Unprimed Cases 444 Marlin Caliber 50 Per Bag. Over the years the .444 has been offered in a number of rifles and even a few pistols. It is another caliber that is seeing new life due to the changing game laws in many states allowing straightwall cartridges for deer hunting where they were previously limited to slug guns and muzzleloaders. Specifications for Starline Brass Unprimed Cases 444 Marlin Rifle Brass: Manufacturer: HSM Ammunition Gun Type: Rifle Caliber: .444 Marlin Primed: No Quantity: 50 Fabric/Material: Brass Package Contents: Starline Brass Unprimed Cases 444 Marlin Rifle Brass