[JerryM]

Been awhile since I've been on the forum. Is it possible to check the alignment of a barrel to the action by using a straight edge and squareing off the action and measuring to the barrel on each side? I would be using the same point on each side of the barrel at the 20" point.

 

[TinMan]

I don't see why not, as you have some decent scale/straight edge long enough and at least a caliper to measure. Also, sometimes scope mount screws on the action are bored off center, so check them also when you are sighting down a barrel.

 

[JerryM]

Well I measured and the difference between the two dimensions was .034". I could see the scope was not aligned with the muzzle. I'm sending the rifle back to the manufacturer.

 

[Sammo62]

Had this happen once on a Mauser build I did. I then ordered a Mandrel to square up the front of my actions and this issue went away. I noticed it when I mounted a steel mount and started boresighting it and aligning the rear of the mount for center. I shot the rifle and noticed I had to move the rear of the mount to compensate for my reticle center being so far to one side. I could not believe it, BRNO action and at first thought it was the barrel shoulder. Luckily, after truing up the action face the primary and the secondary shoulders both marked with a sharpie showed to be hitting in unison. I was able to float the finish reamer in and redo the headspace and all was well with this 308. I did several others later on and also ordered up a lug press to lap in the bolt for even better headspace life. It intrigues me what CNC is able to do with the interchangeable barrels these days.

 

[Sammo62]

Yes, had to move the barrel shoulder forward too to compensate for the material loss and match the primary and secondary fit on a Mauser action.

 

[JerryM]

Update on this post

I sent the rifle back to manufacturer and 5 weeks later they sent me a new rifle. The rifle I sent in needed over 18 minutes of windage. The new rifle when bore sighted was dead on center, when I sighted it in it only took 1-1/4 minutes. It was worth the wait. The rifle is a Bergara Premier Long Range in 6mm CM. All I can say is they let one slip through their QC but they definitely stood behind their product and all it took was one phone call.

Jerry.