Starline Brass Star3855EUP5 Unprimed Cases 38-55 Winchester 50/Pack The .38-55 Is The Standard Length Of 2.080" Which Is The Same as Winchester Case. Case Mouth Has Thinner walls (.0072" Average Thickness at Mouth) Than The Winchester Case Allowing For Use Of The Wide Variety Of Bullet diameters, especially In Tight Chamber/Large Bore situations. Type: Unprimed Case Material: Brass Style: Large Length: 2.076"-2.082" Gun Type: Rifle Metal Type: Brass Caliber Or Gauge: 38-55 Winchester Quantity: 50 Per Bag Recommended Usage: Reloading