My underwood ammo showed up today. 135 grain 1600 fps. Jhp I also had a box of PMC bronze that I bought with the gun. As expected the PMC was pretty weak but otherwise worked fine. The Underwood definitely provided more audible feedback but recoil is mild. This is easily my favorite gun. I just need aftermarket sights. I am seriously considering letting go of my OD green G36 in favor of a G29. As a side note, all brass looked to be in excellent shape after firing.