45-70 and 45-90 brass have extremely slight tapers from head to mouth. "Blowing" them out to accept .476-inch bullets, as 475 Linebaugh and 480 Ruger brass are, in essence, blown-out and shortened 45-70 brass is probably doable. What sort of loss from brass rupturing near case mouth should be expected when using 45-70 and 45-90 brass full length? What I anticipate is a higher failure rate from longer brass because Linebaugh and Ruger brass require less expansion at the mouth. Shorter brass' mouths are closer to .476-inch for mouth inside diameter because less taper has occurred.
What sort of loss percentage should be expected from virgin Starline brass?