I have some of the thin wall Magtech cases in 12, 16, 20 and .410.
The 10 gauge cases that I have are extremely thick- made my Rocky Mountain Cartridge and have the same I.D. as a plastic hull. These cases must weigh three times more and are much, much thicker than their 12 gauge brothers from Magtech and the 10 gauge wads are a good snug fit.
The only thing I went up on size (to 9 gauge) with is the overshot wads, which I wanted a bit larger in case the mouth opens up just a bit, as it does usually on the other cases.
I'm going to try lightening the shot by a bit and going to 110 grains of powder. I bet it will thump then.