clubs usually restrict to no larger than #7.5
28 ga , very effective for bore size, for skeet, bird hunting, spl 5 stand...I always used #8 personally-with high antimony. In all gauges for skeet. split the cost of a pallet with buds.
3/4 oz means #9 ~439 pellets
#6~168 pellets
step back 21 yds, shoot pattern board with both,
pattern boards good tool.
I wanted something heavier, #8, but still pellet count (308) wind, rain...helps a bit