This is a situation where I like to reference a 3rd source, in this case I have Hornady's 4th ed. data. They list the MAX load as 56.6gr of WIN 760, a min load of 49.4gr, with a Federal 210 primer. Max Vel - 2800.
I've had good luck with WLP primers, and that is the primer listed by Hodgdon, so I wouldn't worry about it lighting up that 760. I've also had good luck with Hornady data, but I stay away from their MAX, since I don't always use the primers they list.
Based on the 3 sources, 53max-55gr MAX, and you would be safe starting 46gr-48gr.
Personally, I would use a WLP, and load a few at 48, 50, and 52 gr. If the 48 gr & 50 gr shoot best and similar patterns, I'd go with 49gr. Same for 50 & 52. If 52 is best by a noticeable amount, I'd try 53, and a couple at 54 if it's getting better. If 50 is best, I'd bracket (49 & 51), and see which side to be on. Could end up at 50.5gr for a nice accurate load, for example.
I should also mention that I pay attention to the pressure #s that get posted, and if a powder is at or near the top of the range, I definitely want to stay below the MAX listed to account for variations from the test equipment to my test equipment, which includes my limbs. Since I seldom see the pressure curves of the listed powders, it's hard to know if pressure is going up incrementally at MAX (linear), or taking healthy steps up in pressure (non-linear) and quickly approaching dangerous levels.
