.416 Rigby Barnes 350gr powder question

[Hzus]

I have got some .416 Barnes 350gr bullets and some Vit N560 to load in my .416 Rigby. Can anyone provide some loading details or ever done this. Barnes only lists some IMR4350 with this bullet and Vit lists a Swift A frame 350gr with N560.
thanks

 

[Green Chile]

I just looked through 11 reloading manuals (including 2 Barnes manuals) and did NOT see that combination listed. I also did not see that powder listed for this question.