I just made the switch to CO from Production with my 34.5 MOS. My current set-up is a glockstore tungsten guide rod w/ 13lb spring, TTI Grand Master spring and connector kit, and SRO on a forward controls design plate. I have a couple Dawson and Henning magazine extensions. The gun has about 11,000 rounds through it. I put about 600 through it with the extensions with no issues. I mostly shoot 147gr Federal American Eagle.
A couple weeks ago I installed a Timney Trigger with the red return spring.
In one range trip (about 350 rounds) and one match this past weekend, I basically can't get through a magazine without multiple failures to go into battery. The slide stops with the top bullet in the magazine stuck against the feed ramp. Tapping on the magazine or back of the slide gets the round to chamber. I initially chalked it up to the recoil spring being too light or a magazine issue, but it's still happening after swapping the stock, barely used RSA back in, and it has happened with all of the extensions. I haven't had a chance to try a stock magazine yet.
I've read through a lot of the big thread on the Timney Trigger, and have searched, and haven't been able to find similar malfunctions happening with the Timney. I can't figure out how the trigger would cause that kind of malfunction anyway, but it's the only change I've made before the malfunction started. I appreciate any help or tips you folks might have.