Hello
I do not know these, nor did i find elaborate info on the pages you linked.
However, i have used THV (High velocity round) as in :
http://www.quarry.nildram.co.uk/THV.htm
Which we used to load ourselves.
These are indeed quick, but lose velocity quickly. They also did not feed on unported and unpolished ramps hence i did not use as a carry round do to reliability issues.
It does make a cool blue/white flame from the barrel though!! Like a 20cm barrel flash!
May i ask why you need something like this? What is wrong with a blaktalon or other holow point?
Hoepoe