I'm still hittin' 'em with the same Rem 4x6 Duplex loads I've been using for darn near a decade. They pattern so well out of my 870, I don't need to change a thing. I will be trying some Hevi out once I eat up all these loads I have yet.

These are what I use: http://www.remington.com/products/ammunition/shotshell/turkey/premier_duplex_magnum.asp

This is what I use it in:

Rem 870 with my own paint job. Rear barrel, of course.