You will easily get the best velocity and accuracy with Reloder 15. I use 36.0 grains with the 87 Speers. Don't even think about it anymore - it just works.
only difference here is that I use 37gr for 3071fps. Lays deer low, one to a customer.
"Civilized men are more discourteous than savages because they know they can be impolite without having their skulls split, as a general thing." Robert E. Howard