The main thing with a wooden rod is to never put your hand more than 6 or 8" from the muzzle; if you try pushing the ball down in one long push with your hand at the very end, you run a big risk of the rod breaking and spearing your hand. I have used wooden rods for over 25 years and while I have broken a few because of poor grain, I have never speared my hand. I don't particularly like the rubbery synthetic rods because they are too flexible and worry about abrasion from the fiberglass ones.
cheers mooncoon