RE: Barnes "X" bullet?
Barnes X is a mixed blessing for rifles. Many folks love them and consider accuracy to be excellent.....others can't get them to shoot well and say they leave a lot of copper in the barrel and it's a mess to clean out the copper.
Performance seems to be excellent but accuracy must come first.
All in all the Nosler Partician is still the standard by which all premium bullets are measured and one has a hard time finding a dissatisfied customer.
If you reload the Barnes bullets, get the Barnes Manual....the loads are different with the solid copper bullets and in some cases it's significant.