Dave,
According to Ross, this is the most difficult of all loading. Basically the problem is twofold, the velocity and the bullet. I have spoken to Ross on this and know that he is making the bullets himself, which is very time consuming. The "LT" capped bullets are needed to get the velocity. The velocity is the next problem. Ross is using a duplex load of a secret combination which gets him to the 1500 fps which is needed as the guns were regulated for this load.
There is a Fauneta for sale on GA which was never able to get shooting.
Good Luck,
John