So far I have tried them with a few differentsabots... The accuracy was no better and no worse in most cases. Of course I am not one that pushed sabots all that hard so possibly the sub base is not making any real addition to the overall accuracy.

I have not tried them with the Great Plains Conical yet. I have not put my Black Diamond XR back together since I blew out the 209 nipple. I have got a replacement nipple for it and a new breech plug.. just been shooting other rifles and do a lot of scouting in the woods...