Haven't tested in heavy rain, but in light rain they do seem to be working - although they also worked in the past - as a previous post says, it depends on how the rain is AT THE MOMENT.

As to the castles - I think the person was referring to shooting INTO the castle and not out. Needs to be investigated. In my only castle siege game, I had guns OUTSIDE the castle and from certain positions I was able to fire in- these being at a height and angle that allowed direct line of sight and through the gateway. Otherwise, no sight line, no shooting.

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DragonCat
"On the prowl . . . ."