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Thanks for the clarification. Now I understand. I've only used my 500 for duck hunting, so I've only put 3" shells through it. I'm well aware of the varying lengths of "2-3/4" shells, but had not heard of this issue with the 500.

I had exactly the opposite problem with my 930SPX. My home defense load of choice is Federal Premium #1 (or 00 when I couldn't get #1) with the FliteControl wad. This shells are at the longer end of the spectrum for 2-3/4" shells. As a result, my "7+1" shotgun could only hold 6+1 until I changed the magazine extension and added a XXL cap to that.

I see three reasons for the minishells for home defense use.

First - recoil reduction. This would be helpful for anyone that might be recoil sensitive. I know we're all he-men on this board, but it might be nice to have a setup that our frail little wives could handle.

Second - reduced penetration through walls. This could be helpful, especially for apartment dwellers. The #1, or better yet #4, buckshot is bound to go through fewer walls than even a reduced recoil 2-3/4" load.

Third, as you said, is increased capacity. There is no denying that the shotgun is the king fight stopper at short range. Unfortunately, they are slow to reload. That extra 1 or 2 extra minishells might make the difference between winning and losing.

I've never had that problem, but I have not put many rounds through my 500.

Going by the video on the site, it clips into the groves inside the receiver. Looking at the picture of the device, it appears to have slots that would allow the lifter to rise and fall freely.

They're being sold for $15 on Amazon.

As some of you know, those little 1.75" Aguila Minishells only work reliably in some pump action shotguns. This little adapter will allow you to use them to increase capacity and reduce recoil in Mossberg 500s & 590s, plus the Maverick 88.

I read about the OPSol Mini-Clip™ on the Mossberg Owners forum. A fellow bought one and is very pleased with it.

Unfortunately, their website gives no information on the price or where to buy it. I have asked the individual, but haven't gotten a response yet.

The device is made by OPSol TEXAS and they seem to be located on the Northwest side of Lubbock. Maybe one of our Lubbock members could find out more?