They vary a fair bit. If you click around on www.dube.com, for example, you can find an info sheet for their high-end torches that claim the entire torch weighs about 10 ounces; but individual ones vary noticeably in weight, enough that they make a point of saying that a set that you buy will all be matching weights.

I'd suggest a) get a set of regular clubs to compare with and balance your dowels so the center of balance is about the same fraction of the total length down from the top; or b) weight the ends enough that you can tell they're weighted, but not much more.