645 still jamming

[Timber Wolf]

<<Have you checked your extractor? The extractor needs to flex outward slightly as the round feeds upward. If your extract is stuck in place the hook could be catching on the cartridge rim.

I'd suggest a detail strip and clean. Shooting cast ammo produces more soot and carbon then factory FMJ. This is a 30 year old plus gun after all.>>

There it is! Thinking about the trip to the range on Friday, I "now" remember that on one of the jams, there was a spent case still inside the action, "floating" on top of the live cartridge that wouldn't chamber. Rather crowded in there.

BINGO!

So it was an extraction problem. So I just checked closely the inside of the extractor and found a load of crud. I had to scrape it out with a very small sharp knife. So I had not cleaned well in there, and from now on I will. The extractor was flexing slightly as it should.

Thanks for the very good advice. This is a good group of people.

Glad you got it figured out, and posted it for the rest of us. An old shooting buddy of mine was a copier repairman in real life. His standard practice on a repair call was a through cleaning of the machine before attempting anything else. 9 times out of 10 the cleaning “repaired” the machine.