The Super Pigeon (unfortunately not easy to find given American ammunition makers' tendency to try to sell both heavier and faster loads as their "premium" pheasant shells) delivered the most pellet strikes in the 30" circle.
'
Reasonably available.
https://www.grafs.com/retail/catalog/product/productId/4012What is hard to find is the Remington SP12 wad which was ideal for this load with Herco.
Last batch I used the CB1114, 26.5 grains of WSF and a true weighed 1 1/4 oz of #5 nickel plate. WSF selected for stack height in a AAHS. It still requires a bit of wad pressure.
They run 1230 +/- a little over the chrono.
Major benefit is the birds seldom run. Chasing running pheasants is for kids, and I'm no longer one.