SG actually have preferences like other guns. You should try a few diff loads & "pattern" them. I like the various low recoil #00 buck, but they all do not hit POA & some pattern tighter than others. Just for indoors, I like #4 buck. You get 27, 24 ca projectiles arriving enmass, coverng 6"-7" @ 21ft.
If the fight moves outdoors, then the #00 has an advantage. The heavier/larger pellets will have more momentum as the range increases & fewer will hit, so the larger pellets will provide greater tissue damage. The avg riot choked 12ga spreads roughly 1" per yard. So @ 30 yds, you'll be lucky to land half the shot charge on target.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".
Last edited by fredj338; 12-11-2012 at 15:33..