I bought a brass rod from Ace Hardware that was 3 feet long. I then cut into rods for my revolvers. Yes, I've had a few squib and so has my shooting partner. Using brass and a brass hammer it has never been a problem pounding out a squib be it lead or jacketed.

I would never use a wood rod. I've seen them brake while I was a range officer at one of the largest shooting ranges in the country.