Huntinaz, email Rimrock, they will almost certainly give you some idea as to powder charges.

I've loaded 215 SWC's with Blue Dot, worked well, but I didn't push it too hard; I don't care to share the data.

I wouldn't care to try 800X for that application.

I can't speak to the Accurate powders or Long Shot as I haven't tried them for that heavy a bullet.

'Four legs good, two legs baaaad."
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"Jimmy, some of it's magic,
Some of it's tragic,
But I had a good life all the way."
(Jimmy Buffett)

SotG