Let me start off by saying that I'm a lefty, and I'm in constant search for a lefty friendly pistol. I also don't have huge hands, so many of the newer pistols with adjustable grip sizes are attractive too.
I was at the 2012 SHOT show and had the opportunity to handle the HK P30. I was very impressed with the handling of the gun, as the controls are more lefty friendly than anything I've ever handled.
I picked up a P30 V3 today and headed to the range to get started with it. I have an IDPA match on Sunday, and would love to use it for that. The first magazine went great, right on target and very comfortable. At the end of the magazine, I was surprised that the slide didn't lock back. I function checked the gun and everything seemed in order. Another magazine and the same thing, slide goes forward. Same deal with the third... OK, now I'm thinking that it's me and not the gun. My normal grip is with my thumbs facing forward and pressing against the frame for added sbability. I realize that my left thumb is pressing against the right side slide release lever and I'm applying enough pressure to send the slide forward after the last round.
After trying a couple of grip changes, I found a very comfortable grip while keeping my thumbs away from the slide release lever. Not exactly what I was hoping for, but I can adjust to this.
Fired 300 rounds in about an hour. Flawless operation and amazing accuracy. Certainly the most accurate handgun I've ever had right out of the box.
Was wondering who else may have this slide issue, since the levers are on both sides of the gun?