Remington40x,
I think you could make cases from either 50-140(3 1/4")Sharps cases. They would be a few thousandths small, in head diameter, but this should be of no consequence. Depending on the particular rifle, you may have to thin the rim and/or adjust the diameter. You will have to trim it to length. As an alternative, you might try 50-140 Win., which would be a little smaller still, but should be OK with reasonable loads, or 50-110 Win., which would also be a little short, but you could load the bullet "out". Kynoch has started loading some cartridges again, with boxer primers. By now, they might include 450 No. 1 Musket; it would be worth your while to check their website, to see.
Mike
