I have personally used SKS rifles under stressful conditions and there were time when it wasn't possible to clean the rifle. The ammo used then was all corrosive without question.
The humidity went from very low to very high on a regular basis. This made a huge difference when it came to rust. Hot and bone dry = very little rust. Warm and humid = lots of rust.
Ammonia does nothing to counteract rusting. Might even promote it. Windex is mostly water and when it's sprayed down the bore the water in it dilutes the salts from the corrosive primers which is mixed in with the carbon residue from the powder. This helps reduce the rusting but doesn't stop it.
Ballistol will hold rust off for a while but it isn't something you want to leave for an extended time. I found a rusty P35 Browning HP barrel and soaked it in Ballistol for a week while I went on vacation. The barrel turned black and took a lot of work to get it back to it's original finish.
OP, the advice given about if you don't have time to clean, DON'T shoot is very good advice.
Range shooting is much different from shooting in the field, especially under stressful conditions. If you're out plinking and get a stoppage or the rifle becomes a bolt action things can go from worse to a disaster very quickly. You nor I don't have to worry about this and it's nothing more than an avoidable nuisance. So either clean after shooting corrosive or shoot non corrosive.
I have seen quite literally thousands of milsurps that had rusted out bores that otherwise looked to be in excellent condition. Many of these were battlefield pick ups that were left out in the open after battles and after WWII ended. They were all eventually picked up if they could be found and many of them ended up in Soviet satellite nations where they were stripped to their components, cleaned, refinished and reassembled without any concern to match up numbers. Many here have purchased some of those rifles in the form of Mauser rifles as well as other side arms. Those rusty bores came from corrosive ammo.
Even a lot of the Allied weapons were in similar condition. Again, combination or harsh propellants and corrosive priming.
Take care of your SKSs and they will last a long time giving good service. Fine rifles for what they were intended for and in a pinch will do yeoman's service as a hunting rifle.
There is an old saying about firearms. "Take care of your rifle and it will take care of you."
