Yes I'm cleaning out all corrosive salts. Ballistol cleans all corrosive salts (read about that). It can also be mixed with water. None of my other milsurps has any problem like I described earlier. Obviously, the SKS's with the chromelined bores do not have any problems. The only one showing that strange behavior is the non-chromelined 1950 Tula SKS. Most likely it's a crappy steel batch for that one (impurities like sulfur and phosphorus). With regard to cleaning with water do you imagine how much water would be needed on the front line in 1914-18 and 1939-45 to clean hundreds of millions of barrels? Water was very precious and badly needed for soldiers.
Apparently, you're NOT "cleaning out all corrosive salts". Please listen to people who are trying to help you.
Here's how I teach anyone with a nonchromed SKS to clean after shooting corrosive:
Field strip completely.
Set aside the stock, trigger group, rear cover, return spring, and the secondary piston and its spring.
Toss the bolt, bolt carrier, and the main piston in a 5 gallon pail. If the gas tube has a non wooden handguard on it, toss it in too.
Boil up a full electric kettle.
Pour some boiling water into the gas tube over the pail.
Place the barreled action muzzle down in the pail and rinse through the chamber, secondary piston hole, and gas port.
Also give the inside of the receiver a good splashing while you're at it.
Set the action aside and give the pail a nice swirl.
Drain and let dry. It's hot, so it'll dry very fast.
Clean and lube as usual.
I am personally aware of close to a dozen nonchromed SKSs that have NOT had a problem since their owners adopted this method.
Also, I am not aware of any significant part of the Warsaw Pact that was in want of water...