Re: Lee breech lock Challenger kit
Bushings are made to provide rapid die swaps, supposedly without having to re-do die adjustments.
If we don't move the die lock ring and only install dies hand tight - as we should - then the dies won't get out of adjustment anyway.
I can easily swap screwed-in dies in about 40 seconds and in about 8 seconds if using a quick change bushing. Given three dies for most handgun loading, the bushinga have a potential to save about 90 seconds in a normal loading session which typically lasts a couple of hours. Big deal; bushings can't 'save' enough time in the course of a year to let me watch Archie Bunker's show ... once.
I don't remember what any kit includes but none of them are complete. For what you need to reload, first thing you need a good loading manual with clear, well illustrated instructions and loading data. Suggest noobs get either a Lyman or Lee manual, in that order.