No blood does not always mean a miss. My son's first buck had us completely puzzled as to how it went about 50 yards with a 150 grain 308 Remington core-lock through the lungs with not a drop of blood to be found. My son mentioned that just as he was getting ready to shoot the buck stretched...
My son intends to use his 7mm08 for Elk in October, I was hoping that you could share the load you mentioned for the 150 grain GMX bullets? Thank you, Stan