.469" Diameter 480 Grain Round Nose Hand Cast Bullets with crimp groove, 20-1 alloy SPG Lube. 1.215" Long, .730" from the crimp groove to the nose. Made with the 577/450 Martini Henry in mind.
Posted on 3/21/2020
Used these to make smokeless loads for my MKIV martini henry in Bertram cases. Good bore fit. Got excellent results and no leading. Very uniform and consistent. High quality projectiles. Both these and the Bertram brass work fine with the Lee 577/450 dies. Be aware though that the Lee dies size the neck to about .458. I simply neck size only with a 480 Ruger sizing die and use the Lee dies to flare, seat, and crimp. The Lee sizing die is still great for full length sizing brass when needed.