I just re ran an experiment. My Shilen barrel is head spaced normally, but I have other rounds fired in other 06

I found one that would go in, but would not extract.

I then added the wedge material on the far side, no extraction, I slipped it in on the cam side and out it popped out. Material was .020.

I call it a wedge because that's what I call when you slip something under a lever to get more throw out of it. Scotch is another term.

May not be mechanically or technically correct.

What that tells me is that fail to extract problem is due to stuck cases in the chamber not the lack of extraction.

Keep adding to the lever and it may be enough to overcome the stick.

Said stick can be carbon build up (hence the chamber cleaning) a tighter chamber that the dropping of brass expansion is not letting go, too much powder and over pressure (though my loads are all on the low side for the most part and no issues with the ones on the high end)



the point being no one knows what the cause of the sticky case is, one solution is to add a permanent spacer between the baffle and the receiver and get more more overall extraction distance