Should be more than powerful enough to launch them clean out of sight, or as another member pointed out, punch a hole clean thru the ball itself. You might have to rig up some kind of sabot to prevent that from happening. These little things are a lot of fun, yet surprisingly powerful.

Quote Originally Posted by pedro243 View Post
Cheers Doug

I saw a video of someone shooting tennis balls out of a cup launcher on youtube and thats how i became intrigued and eventually bought 1. I also bought some Kynoch black powder blanks and i hope they will be enough to launch a tennis ball. Thanks for all the information and links.

Cheers PJ