I have used Mag Tech with black powder, 11 ga. wads and large pistol primers. I never tried smokeless.

The only problem I have had is the rim is smaller and will sometimes slip behind the extractor on one of my doubles.

I also get a lot dirty blow back over the first third of the shell, probably because of the chamber size.

However, you should see the kids faces when I load these shiny brass shells and blast a round of skeet at the local range.

Priceless