ok I want to build a varmint rifle that will work well for long range shots. It will be mostly prairie dog shooting so I want to use a good high bc carmint bullet and want a pretty decent velocity, but barrel life is kind of important. I'm going to proably build off a big horn origin action ag composite stock trigger tech trigger but need to figure out what cartridge to go with. I want good brass available that will last, i do reload so wild cats will be considered.