I don't see myself as a 'more is better' guy, and if that Barnes behaves that way rather consistently, I'm impressed. That's your 'advertising photo' quality of expansion, there now.
But still, I was beginning to get the idea from a variety of sources that, for some reason, 10mm was never going to really add much more to the 'repertoire' than 40SW. So, I just took published load data (Accurate, I believe) and ran the numbers for 36 loads of 40SW and 32 loads for 10mm.
The average ft*lbs for 10mm was 50% higher than the average for 40 (604 ft*lbs vs 404 ft*lbs), so I'm all okay now and not worried anymore.