I make a lot of pyramid bows for a couple of reasons... They're easier to make for one, but also, we have a lot of folks shooting our bows who have never picked up a bow in their life, and the pyramid bow is really forgiving of shooting mistakes...er... you don't have to be as precise with your release as with, say, a recurve bow. They're not the fastest bows in the world, but they're consistent, and that's what you're looking for in target bows.
Lately, I've been experimenting with hard maple backed white oak, and I've been very pleased with the results so far. Both woods are cheap (since they're domestic here in Georgia), and it's easy to find good, straight pieces. My bows are 68" nock to nock (for a 27-28" draw), and I usually glue in about 3 inches of reflex, using resorcinol.
The bow that I'm working on right now is going to be my personal target bow.
It's hard maple (1/8" thick) over quarter sawn white oak
68" nock to nock
4" handle
2" fades
1-1/2" wide at the fades and then parallel for 15", then taper to 1/2" wide at the nocks.
I usually cut the thickness to a fat 5/8" thick - which is essentially floor tillered - and then take it down to its final weight on the tillering tree. This has yielded anything from 30 to 50 pound bows...
These bows shoot straight and hit HARD, and I've shot them in front of crowds out to 60 yards for demonstrations, and they are some of the smoothest (no hand shock) bows I've shot.