Well, Dillon now has come out with the XL 750. I have been using the 650 since it was introduced. I have confidence that they will still offer parts even though it is not a current item. They have always been good at customer service. I would hate to find out that my press + tool heads were obsolete. Over the years I have put a lot of money into that progressive.

theres no way in hell dillon is gonna not stock parts for the 650.

the 750 is the 650 with the 550's primer feed system.
it is a 100% improvement IMO.
I will be upgrading my 650 to the 750 frame as soon as funds permit.
all the other parts are 650 parts.