I am having some good early results with 55 gr Nosler ballistic tips. However, most of the feedback I've received on multiple forums is to buy some 69 gr Sierra Match Kings, seat those over ~24 gr of Varget, and call it good.
I will be trying the SMK's to see, but I have been impressed so far (early testing results) with the 55 grainers, too.
--Duck911