I used to think they were different too, but the load data was so similar, they looked so alike and I got to checking into it and once Hogdon admitted it to me by phone, I can now see that they are EXACTLY the same.
They differ only in the container they are dumped into at the end of the production line.
Either way, I've found them to be the supreme magnum powder for my needs.
BTW, I never use a magnum primer to ignite them. As per Skeeter's advice in the mid 80's I tried WLP primers (my choice of non magnum) and found the ignition to be complete and consistent in velocity for excellent accuracy. Magnum primer use gave me poor accuracy.
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