In reading your posts I was curious about them. Wanted to shoot a 10 ga I'm getting and so the 10 ga to 12 ga. is great. I saw that Cabela's has them, went over there, only 4 miles away, and looked at the information on the package. Interesting, they list on the instructions that the guage adapter and the shell will eject from shotgun together.
Also use Win. AA / Rem. STS for best results.
This is for the Silver.

David