Now that you have seen the price per shell, look up the price per pound of lead vs. hevi-shot or tungsten and you will see why it is so expensive.
Winchester lead likes the tighter chokes. I have one 655 for a Browning inv+ 12 ga and using Win Supreme HV #6 lead I get very nice patterns. If you are set on #5 shot the 665 may be a good choice.
What you see at 30 yards and 40 yards can be very different, especially using lead.