What is the difference in the barrel contours between a heavy varmint and a palma. I know they are shaped different but what i would like to know is, What barrel do you want ? What advantages or disadvantages does one have over the other. I just ordered a krieger barrel from Bruno for a 6.5 creedmoor build and i went with the #17 heavy barrel, but they also had a palm barrel in the same muzzle diameter and weight. Why one over the other?