Do you have the ballistic difference of the .470NE vs the .458 Lott. May not be that much difference in spite of the sizes. The .458Lott is likely a lot higher pressure round then the .470NE.
I have a copy of John Taylor's book but its in a book case behind the Christmas tree right now so unavailable until after Christmas. He didn't have access to the lott round of course but as I recall the .470NE was loaded to approximate the ballistics of the various various .450 NEs due to laws prohibiting there use in certain countries because the .45s were considered military calibers.
