I'd check with McMillan and their fill weight policy, but I do not believe you have any choice of using a standard fill with a 375 Ruger, I'm pretty sure that they only make those stocks with magnum fill in the action area.
�I've never met a genius. A genius to me is someone who does well at something he hates. Anybody can do well at something he loves -- it's just a question of finding the subject.�
