Right now a weird side effect of the way reloading works is the Heavy Rifle reloads faster than it shoots, and reloading doesn't pause the cooldown, so its magazine size is functionally infinite. I think after reloading, guns should be put on cooldown for the same amount of time as shooting them. It'd also make sense to make it so guns that would reload by changing magazines can't cancel their reload to shoot like a shotgun. You should have to reload everything except the shotgun and maybe the grenade launcher all at once.