In 20ga - 7/8 to 1 1/8 oz bismuth 4's. 1oz to 1 1/4oz lead 4's or 5's. I've killed a lot of birds this year with 7/8oz Boss 3/5 loads, and 1 1/4oz lead 4's have been long range hammers.
28 gauge, 3/4 ounce #6 steel is getting it done for me. O/U 28 gauge with IC bottom, mod upper bbl. Haven’t lost a bird thus far. Helps to have good dogs. MTG