RE: .410 for deer
...did I read somewhere that a .410 slug is a 1/5th oz slug? If that's true, then the slug only weighs 87.5 grains..... that's not much. I would feel much more comfortable with the S&B load of 3 000 buckshot in a .410, if that's the case. And I would try to limit my shot to more like 30yds or so.....depending on how the 3 buckshots grouped at that range. I wouldn't want more than about a 4" spread... whatever that range happened to be.
"Progress, far from consisting in change, depends on retentiveness..those who cannot remember the past are condemned to repeat it." Santayana