it is indeed weird how animals react to the shot, I seen deer shot by others (was to there for the shot) that they said ran 100-300 yds before piling up that had massive damage to the heart lungs area, yet have seen some with very minmal meat and vital damage that acted electrocuted just flopped right over.
I tend to subscribe the the nosler theory, i am okay with losing some of the front of the bullet (secondary fragmentation) and having the rear drive through. I have never had a partiton make a huge hole going out unless it struck a rib and a longish shot (one mulie buck at a lazered 348 yds with a 130 NP from a 270 2900 fps @ muzzle), tend to be about golfball sized exits with good internal damage and minimal meat damage.
I used the 125 np in my 264, 150 np in both my 300 wsm and my 7 RUM and 210 partitons in my .338
