I would say the Federal Premium 4 Buck loads. The patterns were as good as Dead Coyote and I would imagine are significantly less expensive.
I patterned with a .670 and .690 Trulock tubes with cheapo Federal 2 3/4 BB, 3" Remington Express 4 Buck and OO Buck loads. Next I am going to try Federal Premium 4 Buck.
Here were my results --> http://rodney.davisnetworks.com/web/patterns/buckshotPatterns.html
