At 40 yards with the right choke/shell combo you should have at or near 300 pellets in a 10” circle of #9s with a 1 5/8oz load. If it got away from that, it was your fault, not the shot size fault.I believe it’s a jebbs xx full. Cva scout stock choke. Rolled the bird then she got up and flew off. Went 30 ish Yards and was done.