What's out there for a waterproof gun case and ammo cases? Cost isn't an issue, just don't want my rifle getting soaked and my ammo too.
I always figured those dry bags for guns were just that. To keep the rain and wave splashes off of your firearm. I don't believe anything with a roll type top is gonna be 100% waterproof. So to answer your question yes you are asking to much in my opinion.
I believe most river runners would disagree with your assessment on how water proof roll top bags are...I know I do.