Lets update this with just a little more info.
Shot Size Pellet Diam Pellet Diam Number Of
AM/STD (Inches) (Millimeter) Pellets/Oz
000 Buck 0.3600 9.1440 6
00 Buck 0.3300 8.3820 8
0 Buck 0.3200 8.1280 9
1 Buck 0.3000 7.6200 11
2 Buck 0.2700 6.8580 15
3 Buck 0.2500 6.3500 19
4 Buck 0.2400 6.0960 21
F 0.2200 5.5880 40
T 0.2000 5.0800 53
BBB 0.1900 4.8260 61
BB 0.1800 4.5720 72
1 0.1600 4.0640 90
2 0.1480 3.7592 103
4 0.1290 3.2766 135
5 0.1200 3.0480 170
6 0.1090 2.7686 225
7.5 0.0940 2.3876 350
8 0.0890 2.2606 410
8.5 0.0850 2.1590 470
9 0.0790 2.0066 585
12 0.0500 1.2700 2300