So that's what you call them? I've been just calling them Heavy field loads all these years. The old MAX load of 1-1/4 oz #5 shot and 3-3/4 dram load at, If I remember correctly, about 1335 fps was/is my old go to load for most everything except ducks. I liked #4 Magnums for them, 4 dram 1-3/8 oz loads. I suppose you could kill pigeons with them, we used to do it with 2-1/2" .410s loaded with 7-1/2s" They looked for all the world like they were dead to me!
BP