28ga-or 20ga

[TN Larry]

Another vote for the 20. It's a gun he could hunt with forever. I'm currently turkey hunting with a youth model 870. My son started shooting his youth 870 when he was 7.

 

[Shag]

The benelli montefeltro would be the lightest autoloader I believe (but hard to find for less than $1200)

The old rem 1100 LT 20g is really light as well... may be able to find one at a gun show

Only bad thing about the 1100 LT and 11-87 in 20 gauge is finding parts. They are nearly impossible!

 

[Chaneylake]

I have a set up for skeet with Briley tubes .410, 28, 20 & 12. Light load 20's are not much different than 28's. You can get both in 3/4 oz loads so the recoil will be the same. I would go with the 20 because you are going to have more options and much easier to find and less expensive shells.

Bingo we have a winner