Tungsten is King of non-tox shot for length of reach. But it costs about $6-$7 per shell, IF you reload your own ammo.
We dropped sandhill cranes at 130, 120, and 95yds with #5 tungsten pellets this fall, and one at 100yds with #6 tungsten pellets.
I'm now loading TSS tungsten #1 Buckshot. The ultimate close range brown bear defense load. 12 pellets of #1B, weigh 1 3/4oz. MV ~1,250fps = brain dead bear.
Too expensive for doves, ducks, and other high volume shot gunning. But awesome LRH shot shells for straight away shots on predators or straight away shots on cranes, after they've flared.