Just put another 200rds (115g Magtech and 124g S&B) through it earlier, so currently at 500rds with no issues. I did notice one small thing with the 17rd mag. When fully loaded, if I can hear rounds rattling around if I shake it. Sounds like they're kinda in the middle of the mag, maybe a little lower. But as soon as I take 1 round out, it doesn't do it anymore. 20rd mag is fine.I bought a 5" on here that had been sent back to SA. The work order listed: Ream and polish the chamber, polish feed ramp, replaced and tuned extractor, lubed, safety checked and tested. So far I've put 300rds through without a single issue with various 115g and 124g boxed ammo. Shoots great. I've notice that little hitch with the disconnector mentioned too but it runs fine.