DFrame, With Starline brass, it’s no harder to load AMP than any other magnum pistol cartridge, except that you have to lube the cases before sizing.
I tumble them, lube (Hornady One-Shot), size, tumble again with a capful of mineral spirits added to the medium, pick the damn medium out of the flash holes and then load as usual on my Dillon.
I’d love to have an 8½ or 10 inch .357AMP barrel, but they currently run $1,500 +. I never saw much reason for the .41 or the .30AMP, but that’s just me.
Frankly, I don’t have any good reason for buying most of the guns I own. I just like ‘em!