I'm sure you know about following load "receipes" for shotshell loading...depends on hulls, wads, primers..it would seem to me that BD would be a limited powder for 20 gauge. I load a few 20s but they're just 7/8 ounce target loads with #6 shot. Win HS hulls, 14.5gr Green Dot, CCI 209 primer, Win WAA20 wad, runs about 1150fps and is a good load. Will also serve as a small game load..lots of good loads out there...buy a book and follow it..I would rather load shotshells than metallic..
Eastbank, if you come on any more of those 650s or heck even a 600 or Sizemaster, and especially a 9000 for that kind of money, you pick a couple up and I promise you I will double your money and pay shipping...no I'm not kidding..