Anyone tried these in a .50 cal rifle yet??

I've shot conicals and sabots from my tc pa hunter and also the firestorm but I cannot do better than the patched ball in either it seems to shoot at higher velocity and also more accurate especially in the pa hunter , would like to find someone that could make a 40 cal. barrel for the firestorm with a 1 and 28 twist then you could really shoot paperpatched or just conicals fast .

I gave them a little test run out of a Rem ML last week.
Shot good at 50yards,but more testing is needed as I only tried 3 of them.Still they shot better than all but 2 sabots that I tried in it.