S-kid,

Forget little skeeters. I bought a passel to use a 10 gauge with 12 gauge shells at sporting clays. All the problems you've seen noted above.

Found gaugemate gold. These reducers stay in your chamber (if you don't overlube them!). Get the gold not the silver. They are available for 20-410 reduction. Here's the website: http://www.gaugemate.com

Regards, Tim