Hi all,

I'm making a large mission-style mirror frame. The sides are 6" wide
and will be mortised to receive tenoned 3.5" rails. I'd like to make
pinned tenons and in order for the pin to be located near-ish the
center of the side piece, I'll need to cut pretty deep mortises (2-3
inches). The mortises will be 3/8" wide. What is the best way to cut
these mortises? I have a plunge router, but I don't know if there are
bits that can go this deep. Drill out most with a forstner bit in my
drill press, then clean up with a chisel?

Thanks!

Kevin