Removing the barrel certainly won't void the warranty, after all the firearm is designed to be a quick change barrel and caliber conversion. Give us a call tomorrow regarding the rifle. We will certainly figure out what is going on and make it right. It might be something as simple as the retaining bolt divot in the barrel isn't drilled center. it is that divot that won't let you "move" the barrel into position. Is the boresighter you are using one that goes in the chamber or one that slides in the muzzle end?
You also don't need loctite and those rifles certainly aren't a POS. Sounds like someone has been finding really old internet posts again.