I just picked up a box of .284 175gn Sierra Gamekings but can't find load data anywhere if anyone has a Sierra manual I am looking for Retumbo and Re 22 data for 7mm Rem Mag.
I think you will find that R22 is better suited for the 160gr and lighter bullets. Stick with the Retumbo or H1000 with those 175's. I have had great results with IMR 7828 long cut version too, but found it to be a bit tempermental here in OR.