I was off yesterday and went out to our public county shooting range. I had the whole thing to myself!!!!!!!! I decided to do a little side-by-side comparison testing between the .45 and 9mm. Ammo was Blazer Brass in 230 grain and 115 grain respectively. It seemed like very nice stuff and a little hotter than Winchester USA white box from Wal-Mart. I set my steel swinging disk at about 15 yards and went to work with the Ruger KP95DC. The 9mm bullets would hit the 6-inch disk with a "plink" and swing it back just less than 90 degrees. Next came out the HK USP.45f. The first hit on the same steel disk sent it spinning around at least four times!!!!!!!! The "Plink" was more of a "whack" and I could actualy see the flattened bullets land about three yards behind the target. I picked one up -- HOT -- and it was just under an inch in diameter and very flat. The .45 really seemed to do a lot more in terms of impact. I don't want to start a caliber war here, and I'm sure shooting metal plates is a lot different than flesh, but the .45 was very impressive. I had no problems making a half-gallon milk jug dance at 50 yards with the USP. the Ruger didn't seem as accurate in my hands. The rest of the afternoon was spend shooting weak-hand and rapid fire with a Ruger .22/45 with a heavy stainless barrel. I even had time to get the Yugo Mauser M48A really hot shooting standing at a target 100 yards away.