AR2206H/H4895 (outside Oz) is the best powder I have used for.416 Taylor when using 400gn-410gn bullets. My favourite load goes 2360fps with 410gn Woodleigh soft. This load crunches big scrub bulls! I like using the 340gn Woodleigh at 2550fps foranything lighter.

I am happy to share loadsifyou pm!