If you're in the sticks, why worry about overpenetration? Even on the streets of Mayberry, the chances seem slim of you actually having to pull your Mtn Gun and there being innocent bystanders directly behind your intended target (in the diner?). Does this really happen? I don't think very often. You might have to shoot thru a car! I like penetration - 240 gr at 850 to 950 fps is . . . oh, yea it's a .44 Spl handload! Not trying to be a smart-aleck, but what you describe (700 fps) IS in fact the standard .44 Spl factory velocity for old lead round nosed bullets (which might overpenetrate). I like the Speer short-barreled mags (not cheap) and the PMC Starfires, but I carry handloaded 240 gr XTPs or Speer JHPs over 7.5 grns of Unique.

This site has some interesting stats you might like.

44 Magnum Stopping Power