Okay so now I have a few more hundred rounds through this stainless Range Officer 9mm and it is running fine. I am now using a Wilson Combat chrome silicon 11# recoil spring.
I have also purchased a Range Officer Elite target model 9mm and have the same WC 11# spring installed in this pistol. I also dumped the thin grip panels for normal thickness VZ grips. Pretty nice shooting guns.
I've been using WC ETM mags pretty much exclusively with these Springfield pistols, but recently I did order a Brownells magazine. So far it works great, so I will probably order several more at some point.