I've been using a friend's XL650 to load .45 ACP.   Win LP primers work fine but for some reason CCI LP primers routinely stick in the primer magazine causing rounds to be loaded w/o primers creating a big mess. [The low primer alarm doesn't sound since the plastic rod doesn't drop].   One of the problems I see using the XL650 is you can't see the primers when reloading.

I haven't had any problems using CCI LP primers in my RL550.  Why do CCI primer stick and Win LP primers work OK in the XL650 ?