Many squirrel hunters often employ a .410 in pursuit of the wiley bushy-tail. As for myself, when I'm not toting a 20ga, I'm using a .22LR/.410 o/u combo. Typically, I feed the .410 3" #6s or #7 1/2s. Both have produced nicely for me. However, others have used #4s with success, too. What shot might you other .410 users employ? And why?