Bill,
I use any of the Methylene Chloride based strippers, but it always takes about 4-5 go-rounds. Next time I take on the crappy job of stripping one I'm going to try this tip: coat the stock in the death-goo and then wrap the stock and goo in aluminum foil, wait 1/2 an hour and rinse in cold water. The foil wrap is s'posed to keep the goo from drying out like Dennis mentions.

I've got a nice Browning/Miroku 1885 Low Wall in .243 that's waiting for me to get up the gumption to do this cruddy job.