What's the big deal with shooting corrosive ammo. Usually it's just the primer that is mildly corrosive anyway.
It's especially easy to take care of in a bolt action gun as one swipe of a patch up and down the barrel and then wipe the bolt face with the same patch and you are good to go.
Obviously, in a gas operated semi auto you have to wipe the gas system also.
The drier a climate you live in, the less of a problem it is as the issue is corrosive salts mixing with moisture. I would not do it, but I know people in Nevada who rarely clean their guns after shooting corrosive ammo and have no rust.
Also, don't use ammonia to neutralize the acidic salts, you are just exchanging one bunch of bad chemicals for another. If you don't neutralize the ammonia after a short while it begins to form microscopic cracks in metal.
I use Ballistol as it neutralizes the corrosive salts and not only won't it harm metal, it cleans and protects it.
It is good for wood and leather also. Perfect for those mil surp guns.