Or just find some #8 shot about 1 & 1/4 oz should be good anytime.
Number 9's early season heavy 7 1/2's after that..don't much care about manufacturer.
I usually shoot Winchester or Federal #8 out of my 20 ga. Stevens 311.
I have been hearing good things about the Rio shells so am trying the 1oz. load of 7 1/2 shot this year.
Rio 1 oz #8 28ga. Kills em dead.