W296 is the same as H110. They require Magnum primers. If you use Winchester primers then no problem as they are for regular and Magnums.

H110 is for the big blast and max velocity full house magnums.
It can not be downloaded more than 3% or so.

2400 powder is more forgiving and does not need a Mag primer but you still use a lot of powder.

From what you have mention on your shooting, Unique is probably your best bet.

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