I have a Winchester 270 but I recently placed a treestand on a spot of my property where I will have a long view over a ridgeline for white tail this season. Im looking to get another gun to mess around with and I think I want to get a 6.5 Creedmoor I was just wondering if someone can specify the main difference for me between the creedmoor and 6.5x55 I would greatly appreciate the inputs.