philb: after only 50 rounds your bore is not 'used'. It isn't even broken in yet. A Tubbs lapping process or a Veral Smith (one of our Moderators) or a Beartooth Bullets firelapping process can help attain better accuracy if there is any roughness in your bore (sharp land/groove edges) or any minute bore encroaching obstacles. The firelapping process has worked for me on a number of applications and has resulted in noticeable accuracy improvements. The firelapping process simply applies a 'controlled wear' process to your bore that smooths it out as would having fired a couple of thousand rounds through it. That may well be why Condor was not advised to lap his bore - it may not have had any real affect.
One thing you can do is to check your bore for copper fouling, residue or coloring either on the lands or in the grooves. If, with a bore light, you can see copper coloring in your bore, it can benefit from a lapping. If you don't see any copper fouling you may wish to shoot the rifle first to see how it looks later.
The first step if you have coppr fouling is to get it out with a good cleaner, then lap that baby and it should improve the accuracy (if ya need to). Mikey.