Am currently using 155 smk in my 308 and have shot 12 small roe deer and a couple of foxes with them. They seem to pass through these thin skinned animals without expanding at all and i have had dissapointing results even with perfect double lung shots just a tiny hole through them. I have heared of lots of people using them with great success on whitetail deer which are about the same size as are red deer . DO you think they will work better on a larger animal like a red deer compared to a small roe deer that only weighs 40 pounds.They are so accurate in my rifle and it will be mostly red deer i shoot with them. thanks .