This subject has cropped up before and the truth is you just can't buy targets that way; yes of course it helps if you open up a pattern to double the size (extremely unlikely even with specialist spreader loads) but you'll let as many slip with "under-thinking" gimme birds.
If you're routinely shooting tight fixed chokes at everything then you need to up your game and understand why we miss close birds and address the root cause, the trouble with identifying a given load as "usefully more open" is that you go from stand to stand with your mind in a state of target/distance analysis, far better to sick to the one shot size (and load), say 8's and carry a small handful of 7.5's for long going away edge ons.
If you really want to gain the extra couple of targets for close stuff then you need a multi choke and CYL or Sk providing you have the knowledge and experience to use them when appropriate.