I recently found out about how far my potato gun shoots. I was at a lake where there was plenty of room, and I was actually able to see where shots landed no matter how far they went. Up to that point, all I knew was that the potatos were clearing houses that were about 100 yards away, and they were still rising when they passed over the houses. Anyway, when you shoot potatos into lakes, they make a heck of a splash, and to my best judgement, I was getting about 250-300 yards out of a good shot. That's farther than I've read about any other combustion guns. To get a more accurate measurement, I'm going to try and secure the use of a driving range sometime soon.
Finally, some fairly big news. One of my friends and I are planning to design and build a new gun sometime in the next few months. This thing is going to be HUGE. I'll post more when we've decided on some things, like weather it's going to be combustion or pneumatic. We're toying with a few ideas. Only bad thing - it's going to be a lot more expensive to build than my other plan. This should be offset by the power and distance it will produce.
Write me about your experiences, so I can have more stuff to add to the page. Pictures would also be nice. Mail me your stories and pictures!