Well Armendask You CAN convert a bolt action rifle to full auto. Charleton, Reider, Howell.
when your wife hates to watch war movies with you because you are constantly saying "That wasn't issued back then, or was NEVER issued, those uniform bits are incorrect, etc etc.
Case in point: Zulu, where Chard and Bromhead are using revolvers that were not made until 1915!
And you spotted the Long Lees in one sequence.
stockpiling brass that hasn't been made for many years so you can shoot those antiques
41 Swiss
577-450
8mm Kropatcheck
43 Egyptian
577 Snider
11mm Beaumont
11mm Vetterli Vitali
.310 greener
11mm Gras
11mm Mouser
297/230 Morris
.455 webley
.45 Schofield
etc. etc.
And of course you need dies and bullet moulds for all that stuff

Finaly. I have a walk in closet and in order to get to the back of it, I have to take guns out of the front.
Collecting Enfields; When the ones you don't have are unobtanium
When you buy EVERY book on the subject of the guns in your collection and are constantly looking for more.