Lets keep it to Tungsten and 12 gauge only so there's no confusion on my part. I'm easily confused.... If you want to throw in some anecdotal info based on personal experience with the 28 gauge, feel free.
It appears many are using extremely small shot sizes which seems practical if they perform as we'd like. Are there any down sides to small diameter shot? I'm a firm believer in there being more to performance on birds than penetration. Big shot simply kills/immobilizes better when penetration remains somewhat equal. Any bird will come down with damaged wings but I'm concerned with what a bird does when broken wings aren't what ended its flight. I want a live bird to feel really bad to the point of not going anywhere. Shot size larger than 6 seems to have this effect on pheasants. Does a smaller Tungsten have the same effect and why?
More shot per ounce does have advantages for sure but how many holes in a bird is too many? If we reduce the size of the payload, we gain some control over this. Just how many solid body hits with smaller Tungsten shot is required to immobilize a Phez or waterfowl.
I can see how reduced payloads are practical from an economic standpoint but how is performance affected?
Lets get into pattern density. Any time we reduce the size (shortened shot column) of the payload, we tend to increase pattern density but at the same time reducing pattern size by eliminating flyers outside the pattern core. Through actual testing, I've gotten some 12 gauge 1 oz. loads to pattern near 100% through a modified choke @ the normal range for 12 gauge testing, 40 yards, by reducing muzzle velocity below 1300 fps. How does Tungsten react to velocity? How fast can we launch Tungsten and not lose pattern density? How much can we reduce the payload and not sacrifice pattern density? Lets consider pattern size to be irrelevant.
Maybe I just think too much.....
Thanks