Everything Danross70 said. My intro to shotguns as a kid was a 16 gauge Remington hammerless double, but lots of my friends began with break-action singles with manually cocked hammers. In our neck of the woods H&R 410s were common. Using the Husky hammergun as a single seems about as safe as you can get until he is thoroughly comfortable. If he's had rifle instruction he should have a grounding in muzzle awareness, and firearms etiquette, but flying birds, running dogs, and shooting companions moving across uneven terrain and varying cover all provide a level external stimuli and potential risks that are very different from a well run rifle range. Sounds like you have a great season lined up next fall!
BW
