I am in the process of converting my LRPV from .223 to 6mmBRX. I removed the swapped the bolt head and used the complete bolt minus the extractor and ejector to headspace the Brux barrel. Once I reassembled the bolt completely, I cannot get the bolt to close over a chambered piece of brass (the same piece I used to headspace the barrel without damaging the head of the brass.

After having tried this, I am thinking that there is a difference in the sizes of the extractors, just becuase of the difference in the walls of the bolt head btween the two diameters.

If I were to just modify the one that I have...how would I do it?