4seventy:

So, you are saying there are three Ruger extractor systems:

1} M77 {push feed, which we are not discussing}
2} Early M77MKII {push feed}
3} Current M77MKII {controlled feed}

What year is the is the break off point between MKII push feed and MKII CF?

Also, SAKO modified their own system and produced what they initially called controlled feed or some such but though I have never operated one...I think it is on the SAKO 95?...an article said it was a system that really did not take control of the round till just about all the way in the chamber {similar to my CZ}. Parenthetically, tho the old SAKO AV action does not have a CF extractor, the extractor on mine {.375 H&H} has been dead reliabled and due to the Mauser-type ejector does control the extracted round til the shooter wants to get rid of it, either by zinging it off yonder or for finger picking as when taking out a live round. It is a good system.