There are two Lee crimp dies for the 45colt. There is the regular FCD, which is adjustable and does not depend on the cases being any specific length (but they should all be trimmed to be the same length for consistent crimps). In fact, this die can be used for 454casull as well as 45colt.You have to trim them all the same anyway so the regular die with a FTX stem will roll crimp them just fine. The lee FCD will crimp too high but you might be able to grind off enough on the bottom that it will crimp in the correct place but I do not load that bullet or have that FCD as I use an old set of Herters 45 Colt dies and seat/roll crimp my ammo with them in a single step.