My S&W 659 is pretty much the most reliable gun i've seen personally; over 15k rounds through it without a single fte, ftf, misfeed, etc...every time it fed the next round and every time it went bang first try..i fired winchester white box, i fired federal red box, i fired a bunch of hydrashok's, a ton of DPX +P, etc. etc...no problems! I was starting to think the 659 was immune to jamming
until last weekend. I got some UMC green box 9mm's that were the dirtiest ammo i've ever shot, right behind the aguilla super high velocity .22's that made my poor rifle choke in under 300 rounds...... in 200 9mm rounds fired I had TWO failure to ejects, the slide felt sticky to move after 50-70 rounds fired.
The rounds appeared to just be getting stuck in the chamber, half extracted...so the next round would double feed into the bottom of the one stuck in the chamber. The only way i could clear that was with a f***ing pocket knife while holding the chamber open half way, after locking it open so i could drop the mag successfully; locking the chamber open using the slide release/retention resulted in the entire casing being hidden by the front edge of the slide to where i couldn't get the knife under the rim of the casing.
Just a point. No matter what you train to do, your firearm may jam horrifically enough that it's essentially useless in a self defense, short time period situation. I'm starting to think the best training would be to carry a BUG , and train yourself to GO FOR THE BUG when your semiauto jams. At least then you don't have to look down, focus on the gun, try and figure out what's wrong...while being shot at, stabbed at, rushed at, chased, etc.