I've had the opportunity over the years to hunt a lot of "wild" birds, as well as many forays to several pheasant clubs for both numerous field and simulated driven shoots. Beyond that, I've also had occasion to "gun" at a few licensed trials, where the number of birds shot in a weekend would likely be equal to several seasons-worth of serious pheasant hunting. For general use, in 12 ga., a standard field load of
3-1/4 dram 1-1/8 oz. of 6's ( 1255 fps ) will do very well. For "driven" birds at longish ranges, a premium 3-3/4 dram, 1-1/4 oz load of 5's ( 1330 fps ) works like a charm, and for closer range stuff, a standard heavy target load, 3 drams, 1-1/8 oz. of 7-1/2's ( 1200 fps)works great, especially if there are Chukars, Huns or other small birds in the mix.
In 20 ga., I stick to a 2-3/4 dram, 1 oz. load of 6's ( 1220 fps) and in 28, the 2-1/4 dram, 3/4 oz. load of 6's ( 1295 fps ) is the ticket.
As to "brands", I've been completely happy with Winchester, Remington, Federal ( but I do stay away from the "promo loads") and lately, I've been shooting a lot of Kent/Gamebore.