The problem with the Ramlines and the Butler Creek mags are that the spring does not always push the next round up far enough for the bolt to catch it and push it in the chamber.
To prove this, I fully loaded my Ramlines and Butler Creeks (steel and plastic lips), and hand cycled all the rounds out of it, reloaded and did the same.
Every couple rounds I had to take the mag out and force the next round up.
I tried putting graphite in the magazine, still had problems.
These magazines are not the same quality that we had back in the late 80's early 90's.
They are all shit. The only mag that works perfectly is the factory 10 rounder.
I have not tried the Tactical Innovations mag yet. But I am about to order a couple of them to try. If they work properly, I am going to buy a dozen or more of them.
Maybe this thread should be tacked.