I just recently got dies from him and he specifically recomends not using the barnes bullets. Even in the carbine with quite a bit more velocity they do not expand and the pressures go up very fast. I am currently testing loads with 200 sierras, 225 sp hornardys and 260 nosler accubond. I have ordered a new recoil pad before shooting any more, I am shooting it in a carbine. Thought about the pistol barrel, but thought I would use the big JDJ more in a rifle. The current load with the 260s is a real thumper. SSKs data shows them getting 2532 with a 270 hornardy and varget in the rifle barrel and I think around 2200 in the 14" barrel. That is a mean load, I am working with H4895, IMR 4064 and starting tommorow, varget. Should be able to do the velocities of the 270 hornady with the 260 accubond just as easily. I will report the findings when all done. I am really excited about the Nosler accubonds. Besides looking cool with those big white tips, they are supposed to expand down to fairly low velocities, but hold together much better than a ballistic tip. They are the most accurate bullet by far in my barrel so far. The factory stuff with the 220 hornardys doesn't shoot well at all in my barrel. Kind of disappointing considering there $30 a box.
Good shooting,
Brian