The 56-50 Spencer (Taylor's) was built to C.I.P. specifications for operation in the Taylor Arms 56-50 Spencer. Rim diameter of 0.629" to 0.632", which may be too small to eject properly in some originals. Rim thickness is 0.057" to 0.061". Thickness of wall at mouth is .0125" average. Case mouth may need to be annealed if not sealing properly with low pressure loads. Maximum bullet seating depth is .375".
Starline is a family owned business and prides itself on producing the highest quality brass case available. With a production process focused on quality not quantity, Starline makes the finest brass and has for more than 40 years out of their state-of-the-art manufacturing facility in Sedalia, MO.