Disagreement over whether or not the S&W is a "quality" weapon aside, Dayman admitted he was using "low quality" ammo. In and of itself, there's nothing wrong with 115gr FMJ, especially for affordable practice but the particular manufacturer might not have loaded the rounds to minimum acceptable pressure for this particular weapon. If by "low quality" ammo he means UMC, they are generally decent rounds but he could be using some other ammo. Chamber pressures and guide spring tensions are carefully engineered and require a minimum pressure to function reliably. Dayman-it is generally accepted that most weapons "prefer" a specific cartridge so I would recommend trying a box each of high quality ammo and ensure your pistol functions flawlessly. Over or under lubricating likely would not affect FTE issues, but proper lubrication should be done per your owner's manual. Though not knowledgeable about your pistol, most require only three to four drops of oil in the right places (on the exterior of the barrell in a free-float design, and a drop on each side of the frame where the slide and frame contact). More than that is unnecessary.
I'm assuming you can shoot a pistol as you already have another, but a firm grip is also necessary. I've seen some shooters who grip a pistol so loosely that it causes FTF or FTEject problems. This is actually called "limp wristing" (no jokes please) and is the number 1 cause of FTE in pistols. When the slide is forced backwards by the gasses of the previous round, the momentum can be lost if the energy is consumed throwing the pistol backwards into the loose grip of the shooter. FTEject is different than FTExtract which is more of a mechanical issue. Just a thought. Keep us posted and good luck. IMHO S&W makes quality firearms and your pistol should be reliable. Should it not respond properly to use of quality ammunition, send it back to them for inspection.
P.S.-in the General thread, look at all the forum users who swear by P-1 ammo (and who replied to you above). He even sounds like the kind of guy you could call to give you SAAMI specs on 9mm and discuss chamber pressures.
