I've been loading 38-40 and 44-40 for a couple years now. (Been reloading everything else for 40 years!)
The 38-40 and 44-40 are a bit special ducks.....
#1...I believe any dies will work in your XL650.
#2...Carbide is only offered in straight wall cases....44-40 is bottle neck
#3....I like the RCBS "Cowboy" dies. They load with a better crimp than the Lees and this is important for a tube magazine or if you are not using a full load of Blackpowder. BP fills the case so a bullet can't slide into the case during recoil. With smokeless there is a void in the case and the very thin rim does not hold the bullet like other cases. A good crimp is important.
#4...If you don't lube the cases, they won't last as long. The thin brass will "Work Harden" and split after just a few loadings. If you lube you can nearly double the number of loading. I use Hornady "One Shot" and leave the lube on after sizing. They slide into the lever rifles like Greased Lightning....And simply fall out of my revolvers when unloading
#5...With a progressive press you need to be sure about die alignment. Those thin necks won't stand for any abuse.
#6...I load 5.5 Trailboss under a 200g bullet with superb accuracy.
#7...There is simply no better cartridge (38-40 and 44-40) for black powder to keep your guns clean. At CAS pressures there is zero blowback. The 45LC blows back so bad that I have guns you need to wear a welders mask to shoot!
I'm a huge fan of the 38-40 / 44-40....You done good pilgrim!