Gunner I didn't look at those links, but from what you're saying, suspect they are about shooting a .40 in a 10mm. I've never done it and don't plan to. IMO the main point is that you can shoot a 40 in a 10 and not vice-versa, just like a 44 Spec. in a 44 Mag. It just makes the 10mm platform more versatile than a straight-40. The 40 is a lot more easily obtained than the 10, although this is less the case than it used to be. Some Walmarts around here even carry 10mm...but it hasn't been too long ago this wasn't the case and there are still a lot more options with the 40.