Winchester model 77 jamming?

[Skizotty]

Hi, I'm a new member and I apologize if this is the wrong forum to post in about this but I inherited a tube fed model 77 and up until about a year ago it fired perfect, now every other round jams when its being fed into the chamber. I have stripped it down and cleaned till it looked new, tried lots of lube, minimal lube, and almost no lube but nothing works, none of the parts even look worn. I was wondering if anyone could shed some light on what could be happening. Thank you for helping!

[Skizotty]

Bump

[swifty]

"Jamming" is a bit vague.

EDIT ~ If the bolt is overriding the cartridge - do these...
Check - for interference in throat.
Check - mag follower and spring
Check - cartridge lifter and spring.
Check - height of cartridge relative to bolt face when cycling.
Check - to see if bolt is fully open during firing cycle.
Check - operating slide for binding in the cam slot of the cartridge cut-off pin which acts as a cam follower.

~~~~~~~~~~~~~~~~~

Check - width of feed ramp ~ 0.230"-0.235".
Check - function with more than one feed throat.
Check - firing pin retracting spring.
Check - radius on mouth of chamber.
Check - that ejector is not protruding beyond the cartridge head seat during feeding.
Check - extractor corner for binding during feeding.
Check - for excessive extractor bite on cartridge.

[Skizotty]

Thank you for responding and I am sorry, that is very vague. It will eject the casing fine but when it is feeding the new round will get stuck diagonally between the bolt and chamber and bend the actual bullet from the casing. Almost pulling it out.
I examined the cartridge lifter and spring and it seems like there is quite a bit of junk build up on the inside and the spring appears to be almost frozen. Is there anyway to disassemble that part more to clean it more thoroughly? Thanks again for responding!

[swifty]

I did an edit above, it sounds like the bolt is overriding, check the list above the dividing line.

Yeah, the rifle can be disassembled, but it's not a simple process. There may be some instructions online somewhere.

I would soak the areas that need cleaned, and try to scrape the crud off. Try to get the spring freed, if you can accomplish this without disassembly I think you will be better off.

[Skizotty]

They are soaking right now. I managed to get most of the grit and stuff out but ill let it soak a little longer and try and get it more free. I'm going to head to the range next week so I'll keep your updated! Thanks again!