I tried .359 sized 147gr bullets in my factory barrel but got horrible leading, it was only tumble lubed though. Never had any success with that... I since got an aftermarket barrel and now I size to .356 and lube with felix lube + extra carnauba. Did 50 rounds last weekend and there was zero leading, shiny bore infact.
I should try these in the factory barrel as well to see if they work as well in that. Still the new barrel stays, it's threaded for a reason :)