I would imagine that the zelous cleaning most people do to guns probably causes more wear that helps. Unless the D.I. inspects your work.
I would think that over-oiling would be more of a problem than wear. I don't think there's much wrong with over-cleaning, but this is based on training/guidance and not much practical experience (book-nerd).
This is a teachable moment here I was at the range whe na guy had a Remmington [I should know the modelnumber] Mag fed semi auto 308 rifle. I noticed the rifle not operating properly. The guns owner and I started talking and I offered him some oil. He said no oil attracts dirt ! O.K. After many more failures to operate I offered him some oil again. He oiled the parts and he started doing mag dumps with the rifle operating perfectly and with a huge grin. Oil is good.
Artificial intelligence is no match for natural stupidity, we shall prevail
I used to clean religiously as is often taught to newbies but then someone made the point that the military being strict about cleaning rifles was more about discipline than weapon function.
Since then I keep everything lubed but tend to run them dirty. Haven't noticed issues. Even had 1 AR15 where I shot over 1000 rounds with no cleaning and had no problems. And now that is one of my smoothest operating rifles.
2015 Toyota Tacoma V6 4X4
#1 cause of barrel wear is over-cleaning, especially with hard brushes. Literally, all that's needed 99% of the time is a cloth swab wet and one on a jag to dry.
I used to run a thousand rounds a month in a rifle and a pistol, each, in competition and training, formally cleaned the guns once a year:
AR-15: lube bolt and BCG before match (hose down with CLP or whatever, shake dry, look for broken things), pick crud out of extractor once in a while. Round count is ~ 25,000, still shoots 1 MOA w a CMMG chrome-lined 1:7 barrel.
Pistol: Hose out with CLP if rolling around in sand or gravel. Cloth swab down barrel then too. Armalite AR-24 (Turkish-made, all forged steel Tanfoglio-pattern): ~ 60,000 rounds, Glock 19 Gen 3: ~ 50,000 rounds. Both have about 10 years of monthly 3-gun and monthly (or twice) IDPA matches on them, plus training, courses, etc. The Glock did a year of matches, training, and CCW duty for ~14 months with only external wipe-downs.
Remington 870: Whenever extraction would "stick" it was time to lube the locking block and grease the action bars. If the interior got wet, it would also need a hose-down with CLP to stop rust. Round count: No clue, 120 rounds once a month for 10+ years, plus hunting, clay shooting, and some bigger 3gun matches with 300rd+ over 2 days.
Let's say all of the internals of the above are "well polished" but they all remain within factory specs and are 100% reliable under both match and tactical training conditions, including a day's worth of inhaling gravel dust, although the BCG would get hosed down/out with CLP every couple of hours.
And to think how much I cleaned my service rifle
2013 Toyota Tundra CM 5.7L TRD (M1 0w20/PUP0w40euro, WIX/CQ filter) 2010 Mercedes E550 4Matic (PP 0W40 Euro, Mann)
i learned in the army to clean after use, so 45 years later i still do. ballistol, hoppes #9, clp, wd40, starter fluid, brake cleaner, whatever is available. rod with soaked, then dry tshirt patch. old toothbrush, qtips and old tshirt patch, wet and dry. a couple of qtip dabs of leftover new motor oil on any semiautomaticís guide rods, otherwise wiped pretty much dry. done, ready for inspection.
2013 vw passat s 2014 toyota yaris l
Loc: Port Orange, Florida
My 20 yo son does some weird things but it works. As soon as he bought his first AR he soaked it in ATF and oils it frequently. He has AK74 and anytime he shoots Russian ammo he says it may be corrosive. Never trust the Russians. He cleans it in the dishwasher and then oils it up. He said bore cleaners won't work on the salts only soap and water. He has had the guns awhile, shoots alot and no problems.