#8's are a little small, even for Tungsten. If shooting Tungsten, I'd opt for #6's. But, at $2/shot I prefer lead if possible. For flying birds where non-toxic shot is required, we've had good results with Kent Fasteel. 3" shells at 1550 fps, 3 1/2" shells at 1625 fps. 4's, 2's or 1's work well for cormorant sized birds, for geese we jump up to BB's.
That picture of the duck in the pattern is misleading. #8's are much smaller than the birds eye, less than half the mallard's eye in size. A #8 pellet is .080" in diameter.
Last edited by esshup; 02/10/1208:07 AM. Reason: pellet size