Lee is real light on the loads, notice they don't list pressure for it.....
I use .308 loads as reference in my 7.5x55, larger case will give lower pressure, somewhere around what it should be. Of couse a chrony helps too, 46g of Varget behind a 150g FMJ was hitting just under 2700fps., this is the load I stick to and neck sizing it has not given me any problems.
I would say 44g of H4895 would be the max load I would approach with 168g in the 7.5. The 47g would probably be OK, but I wouldn't try it.