I've emailed on weekend for 6 different loads and they have sent me back a real nice sheet of minimum and Max powder charges and powder choices + coal. All my Barnes have liked a good jump to the lands and there oal has been spot on.
Best to contact Barnes, but there's a couple 300 grain Barnes bullet IMR4064 loads by the same guy(guy gives more details than a lot of posters there) on Reloader's Nest. The Banded Solid uses a bit less than a TSX.