Pretty much anywhere in British Columbia, we are not allowed to shoot using greased patches at rendezvous'. I have seen 'smokers' in front of the shooting line many times, and they were invariably the result of greased patches. Some shoots, you would be invited to put your guns away (and perhaps to leave) if you didn't comply. On our range, we cannot use our bush trail at all, most summers, wet patches or not. The flash out the side of a flinter could easily drop an ember into dry moss or some such, and result in a fire hours later.