So I am getting this new Browning rifle and I was deciding between the 7mm and the 7mm WSM. From a little research, I have found that the WSM is slightly more accurate but the 7mm has a 3 inch longer barrel. Does the 3 more inches of barrel make the 7mm more accurate than the WSM? Also, does anyone know the difference between Browning's A-Bolt and X-Bolt?