I have two of the Lee Auto-Prime XRs that haven't given me any issues. Thousands of rounds have gone through one of them. Not sure why anyone would buy the old round one brand new anyway. The XR is square and fits the primer boxes fine so you can just dump the primers comfortable unlike the old round one. The XR can also be used with Federal primers.
The new Auto-Prime XR eliminated the primer brand restriction so any brand is now usable.
The new tool shares the body from the original tool, the rest of the components have been improved
or replaced. The new tool features an unbreakable comfort cure leaver, large square trays that nicely
Accept all brands of primer boxes with slide on covers for small and large primers, most important,
The tool features a patent pending "elevator pin". This pin safely separated a single primer from the
Others and presents it for priming reducing the likelihood of a chain fire
Technical Information