I don't think you intended to say what you did: "The Barnes manual only lists data for 1 or 2 powders per bullet." Actually, they list 6 powders for each of the 4 bullets designed for the 458 magnums.
I agree and stand corrected. The powders listed are not one's I've ever used and I didn't have it in front of me when I posted. I remembered that I thought it was useless.
It would have been more correct to say that the powders listed are limited and, in my experience, not common. I'm biased in that I've been disappointed by the Barnes Manual all along.
