I use PMC 2-3/4" heavy field loads of 1-1/8oz #6's in my 16ga for Roosters and Chuckar although I don't chase Chuckar very often these days.
For Grouse, Quail, and Huns I like Federals 2-3/4" 20ga Heavy Game Loads with 1oz of 7.5's.
Don't remember the Fed's Dram Equivelent (2-3/4 IIRC) but I know the 16ga PMC's are 3-1/4.
The 16ga is an OU, the 20's a SXS, and both are choked IC/Mod.

Don't reload for Shotguns but I have enough of both loads "hoarded" to last my lifetime and then some. Matter of fact,,, I just shot my first true Double of Roosters yesterday with the 16. If that keeps up, I might have even more ammo hoarded than I thought. grin