I can't speak specifically about the .40, but I know the 9mm feeds well with Hydrashocks. I think the feed ramp in the 24/7 is designed very well...
Either way, as well as I think they work, I'd suggest you run a number of those rounds through your gun at the range and see for yourself...
Either way, as well as I think they work, I'd suggest you run a number of those rounds through your gun at the range and see for yourself...