I had trouble getting the shells out of the skeeters so I split them long ways with aair drven cutter worked fine no problems since...I use the 8 ga to 12 ga a whole lot even use 10 ga in the 8 ga at times...patterns very good.....even killed a turkey this way....charlie

First ones I have seen with the o rings. Learn something new every day.

It was one of those ideas that sounds good on paper but is flawed in practice .
Even when the extractors would remove the adapter you still had to use a rod to remove the cases from the adapters. I think when it comes to gauge adapters its best to KISS ( Keep it simple stupid) as my AG shop teacher used to say :rotf: . Honestly though for me vintage double gun collecting is such a expensive hobby worrying about shell cost is a non starter for me .

On my " silver " some of the lip was removed like a " gold " so the fingernail could be inserted under the rim of the shell so it could be removed without removing the adapter.

Yeah the shells I were using would always get stuck in them. I think maybe the heavier loads werent meant to be fired in the adapters .

There used to be some plastic adaptors, I bought a pack of 25, 12 to 20 to shoot a special club match, they weren't very expensive and worked fine. I'd load all 25 and drop them in my bag and push out the empties and reload them between rounds..

Here are some samples
chambermates left Gaugemate silver middle and Gaugemate gold right

https://i.imgur.com/OSTuGpv.jpg

I also use gage mates and skeeters 10 ga to 12 ga...they work very well...I took a little die grinder and split the skeeters shell comes out real easy...also use the savage 410 to 12 ga insert works well....charlie