Wow, I cant believe how bad your gettin beat up on here.
The gamey's assumed you had loaded guns because your shells were found on the floor. The are also assuming you will not come back to fight the charges. They are wrong to assume and if you get a lawyer and fight the charges, they will be dropped. They have to catch you with your rifles loaded in order to charge you for that offence. I too would not bend over and take it in the ass over this. I would fight it.
Its a beautiful part of Quebec. Get the court date remanded until Spring and return with your fishing poles and make a vacation out of it. Id love to see the expression on their faces when you show up to court.