Infinite Ammunition Reserves

My suggestion is implementing a system that allows for infinite ammunition reserves. I don't mean infinite magazine ammunition. Essentially, you can go around blasting people with your Super Shotgun. You're still limited to 14 shells in the magazine, but can always keep the gun reloaded from an infinite ammunition reserve. There are some weapons that fire straight from the magazine. You can give these weapons some sort of a 'fake reload'. Here's some ideas:

Assault Cannon: As the gun gets closer and closer to 0 magazine ammunition, it burns red and steam rolls off of it. Once it hits 0, it takes a few seconds of downtime before cooling off with some more rounds ready to be fired.

Flamethrower: After 100 points of flame ammunition has been expired, the Pyro lowers the flamethrower to reload the weapon. This lasts a few seconds before he pulls the weapon back to ready.

Nailgun: Make this weapon magazine based. There's a horizontal magazine on the side. Animate the player pulling it out and jamming a new one in. Make the magazine capacity like 15 nails at a time or something. Same goes with the magazine on the super nailgun.

There's a problem with weapons like the Grenade Launcher. Players could potentially sit there spamming out one projectile at a time as the game automatically reloads one pipe into the launcher's magazine at a time. I don't have a solution for this.