I recently bough a Tristar c100 (Turkish cz75 compact clone) in .40 s&w. This weekend was my first chance to shoot it. I decided to do a watter jug test on the only .40 hollow points I had on hand. 180grain winchester ranger. I did 2 shots at 15 ft. First through 4 layers of an old pair of jeans, and the second through bare jugs. Obviously both shots opended up nice. Both rounds were found in the fourth jug cracking the fith jug. Surprising penetration given how well they expanded. Usually fully expanded bullets end up in the third, at least for 9mm that I mostly shoot. Does it mean anything? Maybe not, but probably half the rounds I test fail to expand when fired through 4 layers of denim. I do like to see em open up when fired through clothing. Good shooting round, good shooting gun. I may even take this combo into the deer woods this november. Here's a few pics. You can see the denim bullet didn't open up quite as much but both penetrated very much the same.