I have read alot of info on this ammo and picked up 4boxes of this Bonded 165grain 40S&W from WalMart. It is kinda expensive 20rounds @ $21.95. I ran a box through my Full Size M&P40/357Sig.I was using my 40S&W barrel in my 357Sig. I emptied the mag using double taps and triple taps. From what I have read it passed the FBI's strigent testing of 12-15inch penetration. It looks like it has great expansion also. Has anyone else had any experience with this ammo. I think I am really liking it and it looks like it compares favorably to Speer Gold Dots.