The 77gr Sierra are pretty tough so expect exit holes on predators.
The 75gr AMax is a better choice but is so long will normally have to be single fed as it will not work thru a magazine unless seated very deep.
Personally I would find 60gr VMax from Black Hills and carry on.
"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."
Jack O'Connor 1963