Doco Overboard
Ultimate Member
Recall the Montana pheasant hunter who killed a grizzly with birdshot? https://www.wideopenspaces.com/pheasant-hunter-shoots-kills-charging-grizzly-bear/
I have many rounds of steel shot ranging from #3 to #1. Some in 3 1/2". Steel is lighter than lead, but faster. At close range I would have great confidence in it's ability to take care of business.
Steel shot is also good for shooting through a tree canopy when your crow hunting. It doesn't flatten out when going through the foliage but kinda light when yo make a hit so not 100% reliable to a certain height.
Crows are hard to kill though and pretty resilient.
Shoots mistletoe down pretty good from a tree too+ it's environmentally friendly.