1911WB: it sounds like a magazine problem. I have exactly the same pistol but run 22 lb recoil springs in it and I have not had a FTF with the heavier springs. I have a whole bunch of magazines, some milsurp I have had for over 30 yrs, some new Chip McCormick 8 rounders, and a handful of others. I have one magazine that stovepipes my rounds - par'n, I HAD one magazine that stovepiped my rounds and it became target fodder.
Anytime a magazine allows the nose of a cartridge to stovepipe up, the magazine's lips are not holding the cartridge properly in the magazine to allow for the slide to pick up the case and move it into the chamber as it goes into battery. Methinks you need some new magazines. I would get a bunch of Chip McCormick 8 rounders, or some of the others - I think Star brand magazines and possibly Meggar are available too. Get some with a warranty so you can get them replaced if they screw up on you too. HTH. Mikey.