If you're willing to spend a little more to convert to brass shells, then yes you can pretty easily reload on your RCBS. You can use 444 Marlin brass as 2.5" shells with no alteration, and if you want 3" shells, you'll have to fireform from 9.3x74R, though that brass can be very pricey. You can get by with just a 444M crimp die, though it'd be a good idea to get a sizing die if you have a loose chamber. They take Large Rifle Primers, though you can drill out the primer pockets to take 209's if you are so inclined.
There is no load data for smokeless powder with .410 brass shells, so load development should be done carefully and with very low starting charges. I don't think most folks are able to get them up to modern factory loads of 0.5oz at 1300fps, but 0.5/1200 is very doable. The converted 9.3x74R brass has a larger case capacity than 3" plastic hulls, so you're able to get some heavy loads up to 3/4oz in them (again, carefully) which makes them a much more interesting hunting cartridge imo.