[BHopp]

After a few shots, my firing pin rotates upside down so that the grooves that would catch on the seer are upside down and fail to engage. I then have to take out the bolt (with some force and get down to the pin and turn it right side up. What do I do to fix this?

 

[kdub]

I know nothing about this rifle, so take it for what it's worth -
If the firing pin rotates 180 degrees in the bolt body, I'm wondering if a retaining pin might be missing that holds it in place.

 

[HarrySS]

IIRC that is a long slender firing pin with a furrule in the middle. the furrule whould have a flat on one side (filed in to it). If that furrule spins or is off center, that is what holds the thing correctly.

It sounds to me like you ARE putting it in correctly, so it fires. But the index is moving. If the part with the indexing flat is loose; a new pin or solder it might hold. Not a good winchester design, but figure they wanted an autoloader in their product line-up.

I'll think some more, but tough for me to recall the older guns, esp auto 22s.