There might be a couple of options that you have not considered. As Dennis suggests ensure that the barrel is not fouled. Weatherby used to chamber their rifles with a long throat, so getting the ogive of the bullet close to the lands might mean that the cartridge is too long to run through the magazine. You could try a few rounds loaded long to see if this solves your problem. If it does your next problem is what to do about it. Often a barrel can be cut shorter from the chamber end, re chambered and re threaded to get past an eroded throat. Weatherby barrels often have a very light contour which could make this a questionable solution in your case. If the rifle is shooting very poorly, a new barrel might be the only option.
If the rifle is new, and has never shot well, there might be a problem with the chamber. Often you can tell from the fired brass if this is the case but not always. A pal of mine had a Weatherby in .25-06 with this problem, and I believe rechambering resolved the issue without cutting the barrel.
My personal opinion of breaks is not positive, but some folks need them. At the best, a break is one more variable to consider if you already have an accuracy problem.
Simply recrowning the barrel will resolve any issue there might be at the muzzle of your rifle. Shortening the barrel might make it more rigid, and theoretically more accurate, but at a cost of increased muzzle blast.
