Birch is my favorite hardwood. Maple and hickory are a bit heavier. Ash is a very close second. If you want a heavy, hard hitting arrow, birch is a good choice. Stays as straight as the other hardwoods and is as easy to straighten. If sealed properly, all hardwoods will stay prettry straight. However, if you carry your arrows in a bow quiver under your arm, as I often do, they will develop a little bow. Quite easy to work out though. I don't shoot hardwoods much because they're heavier than I need, but when I need a heavy arrow, I choose birch. Killed a nice moose with a birch arrow a few years back.