How many guys do you know that can consistently centre a Snow Goose's head and neck in a pattern at 40-60 yards high pasding over with who knows how many variables thrown in such as winds, shooting from a seated position, heads jinking side to side as birds scan for anything wrong below so they can book out not to mention that they are booking out full bore changing their angle all together after the first shot rings out to put as much distance bewtween them and you? Pus the average hunter leads the bird as as a whole not the head/neck especially at higher or longer ranges. Yes, pattern density is critical, very much so. I shoot as small of shot as is practicable to fill that pattern in but the nature of what you are conveying tells me first hand that if you have ever hunted spring snows your sucess rate is very low if you have had any at all as you would have a hard time folding the white devils the way spring snows are hunted. You must be "shooting" them as in jump shooting them by ambushing them and even that has very limited results especially in areas like here lacking alot of cover for you to get close to 10,000 or more pairs of prying eyes!!
Since we are both in SK we should get together this spring and try to hammer a bunch?