The freebore, which effectively adds capacity allows the old 300 to run a little faster than it should. It is a superb game cartridge and was once one of my favorites. Although the belt is no longer "Cool" I have never found it to be the issue some professional writers have claimed it to be. The freebore that allows the extra speed can be though. It is harder to tune than some of the larger cartridges and it is difficult to achieve the long range accuracy we strive for in factory guns. I really struggled to keep my old 300 Bee shooting MOA with my best loads. My 300 RUM is 200 FPS faster, and much more accurate at long range. Accuracy is not everything at long range. It is the only thing as long as you have sufficient remaining velocity and energy for the job. My RUM will shoot smaller groups
@1000YDS than my old Weatherby would @500. This matters if you want to shoot far. It does not if you want to shoot 500. Inside 1/4 mile my old 300 Weatherby killed like Thor's hammer with 200gr bullets. Just my $.02 and its worth what you paid for it.