I am fairly new to long range hunting. I started out shooting a Remington 700 7mm Rem Mag at range, and recently graduated to a Browning Xbolt 26 Nosler, which I love and am efficient with past 1000. However, I recently got the urge to build a custom rifle and am struggling on choosing a caliber. I love the 26 nosler, but I havent been able to start reloading, so finding and buying the ammo is killing me. 6.5 CM is also in the picture because of ammo availability and obviously ballistics are great.. but I spend a lot of time open plain big game hunting so for that factor I was thinking 30 caliber would be nice as well. Maybe 300 WM? What is everyone out there shooting? Recommendations for long range muley and elk calibers are much appreciated!