What year is this...
Seriously. I have taken a NIB Kimber series I , run a patch through the bbl to remove any oil and gone over 2k. I did add some oil on rails at around 1k. I ran out of ammo and the gun was fine. I did have the trigger smoothed,to crisp 4# but thats all I did to that gun.
I have since taken the same gun and run 3k rds without cleaning, oil rail and such at 1k rds, and swab chamber and fed ramp with q tip with no problems.
NIB seiris II Pro Carry, again patch bore dry and went 1050 rds before I had a FTF. I ran another 300 rds before I ran out of ammo, so I cleaned it.
22/45, 2k rds. I did again q-tip chamber and feed ramp spot of oil , rained , so thought best to clean.
Caspian frame and slide 45 ACP, honest I have no idea . I kept shooting it for a year and being range use only , I q-tipped chamber, feed ramped and oiled from time time. In a years time I don't think I ever took the slde off to look. Gunsmith used it and got wet and muddy. he cleaned it up,looked fine, but some range sessions we'd run 3-500 rds so time for springs and such (reg inspect and maint).
I have no idea when the last time an old Colt was properly cleaned. We just shoot it, if its been cleaned I don't know when or whom did it.
My KeltecP-11 ran 1k of carry ammo (testing before I cleaned it) There is another P_11 that I don't think ever has (we were trying to tear it up). I finally steped on a mag(crunch) and lost the front sight (barrier ran into it) but the gun kept running.
What year did you say it was...