I recently picked up an old Sinclair built xp-100 in 308 Win. It was built from a fireball and has an m16 extractor on it. I have to put a rod down the barrel to get the brass out. The extractor is not pulling it out. Looked at the extractor and it grabs the case fine. Loads are just starting loads in the Hodgdon manual and show no pressure. Primer is not backing out so head space seems ok. Any idea why this might be happening? It does it with new Lapua Brass as well as older fired brass.