They handle fine. The slide is slightly wider on the forty, while the frame is the same as the (cast-framed) nines, so the forty is a couple of ounces heavier, but that's about all. They still point and shoot as well as any Hi Power does, which is to say, better than most guns. It was the best shooting forty I've ever owned or shot, and I wish I had it back (it was an SFS-equipped model).Have you shot one? If so, how do they handle?