I guess we all are going to have to accept H4350 simply is no longer viable due to complete lack of availability and most likely will remain as such for an unknown and indefinite period of time. I have been going to my local GS's 2-3x a week that sell powder for at least 18 months and not once have they had H4350 in stock. Same for Federal mag LRG rifle primers, H4831, and Hybrid 100V. Thank God my 300wsm LOVES IMR 4831 and all my other rifles perform well with other readily available powders.
I have taken the steps necessary to never again be worried about brass, powder or primer availability.