RE: Broadheads ok, .410 not ok?
Actually energy will kill if you have enough of it and a bullet that will transfer it properly. This is why high powered rifles kill so effectively. They have enough hydrostatic shock to dissrupt the nervous system and drop a deer where it stands.
Some shotguns and muzzle loaders will do it as well with a shoulder or neck shot.
A .410 or other low powered firearm will not do that, nor will a bow. This is why shot placement is so much more important with these weapons.
Paul