Um well i don't think there are any. In my opinon steel shot sucks the hind tit. I do not have alot of experience with it on yotes but as for waterfowl it should not be in the same category as lead. If the law makes you shoot steel then u are forced to but if not stick with lead man. I know since we have had to switch to steel on waterfowl alot of guys have been cursing steel including me.