Re: Working up load, 300rum
I think that you will have free bore again. The magazine length will probably dictate seating depth. I would start out seated nearly as long as the mag will allow, find your powder charge like you did before then tweak by seating .oo1" increments and shooting groups. Magazine length may work well and you don't have to mess with tweaking seating depth.
To hunt... or not to hunt...? What a stupid question.