As you state, you most likely will never use your DGR on dangerous game but possibly on deer so I would go for something like the traditional 375 H&H, 404J or 416 Rigby which loaded to easy shootable levels, will take deer etc. Opens up the opportunity for cast bullet shooting too which is easier on the pocket and allows you to shoot more often on rocks etc and you still get some of the big bang and push to the shoulder. Of course at any time you can blast off those full power DG loads as well.