I don’t have 5,000 rounds through each of my 1911’s, but I’ve only ever had two problems. The first was with the slide not locking back on a Ruger Lightweight Cmdr in 9mm. Mecgar mags solved that. The other was my wife’s Colt Government Competition in 9mm. The stock Colt mags wouldn’t feed the top round from a fully charged Colt mag. We download by one with the Colt mags, or just use Mecgar mags. I shoot them, clean them throughly, and use Tw25 grease.