I've used pendelums in the past with mixed results. A lot depends on the speed of the bow. With speeds above 250fps there really is no need of one out to 30 yards. In the past with bows shooting around 260fps I've just sighted in a single pin for 25 yards. Shot the bow out to 30 yards in 5 yard increments. The high point was at 20 yards, being about 1 1/2" high. The low point was at 30, of course, being about 3" low.

Pretty much tells me if the deer is within 30 yards I just hold the middle of the chest cavity and execute a well aimed shot. You don't have to worry about judging yardage, picking a wrong pin, a pendelum that didn't swing or rattle. A lot less things to think about. The other thing being that you can still use it on the ground.

This year I got a bow shooting 280+ so there's even less to worry about. Now it's one pin out to just about 35 yards.