I bought a MKIV target model for my daughter to use with her college shooting team.
It works OK. Not stellar. It occasionally jams. The members of the team who have 22/45s are having MUCH worse problems. So much so that they borrowed a MKII for the competition yesterday. That gun worked flawlessly. I read that people are taking the mags and polishing every surface that rubs against something while it is in operation.
I compared the magazine movement on the new one to my MKII that is 40 years old with tens of thousands of rounds through it. The old mags are smooth as glass. The new are rough.
I wish I had time to send it back to Ruger and gripe and let them fix it, but we will miss multiple practices and competitions in that time.
I’m going to polish one this afternoon and try it out. Any other suggestions?