Flashcups - worthwhile?

[Yanqui]

I’m asking this from the perspective of a hunter. I know a flashcup will protect the barrel and wood over time from burned powder. But as a hunter, even though I’m extremely careful to protect the lock area from wet weather, it seems to me a flashcup is like a funnel and moisture could get into the nipple area a little easier. I doubt a little moisture in the cup would cause an issue with a protected cap but why even think about it? Any thoughts?

 

[Beaverman2]

I had one on a Traditions Shenandoah for a while, thing worked OK but got in the way of seating the cap all the way against the nipple from a Cash capper, I never hunted with it, yanked it off and threw it out.