Note that British #5 is essentially US #6, Brit #6 is very slightly larger than US #7 & Brit #7 is virtually identical to US #7½. This is a very useful range of shot sizes, capable of taking most any imaginable upland game, under conditions in which they should be shot. I for several years shot quite sucessfully quail, dove, woodcock, rabbit & the occasional squirrel with a sidelock J P Clabrough 28" damascus, ¼ choke in both bbls, using nothing but 1oz low pressure loads of #8 & #6. The feathers got the #8s & the fur the #6s. I could most likely have made every shot using nothing but #7 or even #7½ equally as well.
