Francis Sell. Francis Sell. Ah, yes, now it's coming back: a 20 for everything. He spread it in every shooting magazine of the times. His pious looks and round shoulders didn't give me all that confidence but I tried it. The key to 20s for average shooters is to remember they aren't 12s. I pick my shots even with my go-to three-inch o/u SKB. I wouldn't think of using my elegant Elsie 20 except for dilly-dallying for grouse.