Looking to build a rifle for great accuracy and least amount of drop for deer hunting, 650 yards will probably be plenty of distance at this time. Currently use a 300rum and ar15 in 6.8spc. One when I know I'm woods hunting other for field edges. 300rum is great but just want something different (smaller). I have a .223 in both 700 and ruger 77. Wondering if these are able to be rebarreled in a larger caliber or sell them both and put towards a better option? Have been looking at CA long range mesa.