Remington Ultimate Muzzle Loader Brass?

[Scalloper]

I own and have shot a Rem UML for 6 years. At times its difficult to find the brass cartridges. I believe I read where they are 45 super magnum, can any of you confirm what these cartridges actually are? I have been repriming the ones I have with 0 issues. I read one article that said repriming is only recommended 1-2 times before resizing. I found that a bit odd considering there is very little pressure exerted on the brass itself in this setup.

 

[0.1 Aggregate]

The .45 Super Magnum is a rimmed cartridge so won’t work. The .45 Winchester Magnum is a rimless case 1.198” long based on the ‘06 case. According to some, the UML uses cut down .308 brass.

https://www.gunsamerica.com/digest/remington-ultimate-muzzleloader/

 

[Scalloper]

Right Win Mag not super mag. Thanks. I will do some measuring and see if 308 cut down may work. I keep saying I am going to send it in to Jeff Hankins for a smokless conversion but I have not at this point.