Thanks for the replies. I didn't have anything better to do this morning (I lie, I had lots of housework to do...) so I got the chainsaw out and cut it into slabs. Unfortunately I found a bunch of seperations in the growth rings right through the best part, @!*%. There was some soft wood that went deeper than I thought too, oh well. The tree was at least 40 years old by the rings, about 18" to 20" diameter at the base. There was 1.5" of soft sapwood, then the rest was a rich red heartwood. If it hadn't seperated along the rings I might have been able to squeeze in 4-6 pistol stocks. I managed to get just one beautiful quartersawn pistol stock that followed the curve of the trunk. Lathered it up with white primer and it's on the pile right now. That alone was worth the work.
I think crab apple would be a great wood. If not for stocks, then maybe for patterns and other small projects. They can't be too dissimilar.
-Eric