4seventy:

I called Ruger.

Yes, they made MKII's that were Nnot CRF. They are researching the details and will email me.

The original M77 has never been officially a "MKI", but I know what you mean. That rifle I've heard mostly refered to as the "Tang Safety" model, and it is not and never was CRF. Your nomenclature works as well.

Guy's, if you want to test your rifle for its ability to control a round all the way into the chamber, try this:

"Using dummy rounds and pointing the muzzle in a safe direction..."

With a charged magazine, tip the muzzle down and slowly work the bolt {as you might if following up a wounded critter and not wanting to make a noise that might spook it to run}.

Some 98's and 98-types will control the round all the way into the chamber. Others will allow the round to pop up in front of the extractor claw. This makes a "ping" sound of sorts similar to the noise made when feeding a round in a Rem 700 or other pushfeed, and if the 98 is a stock original and the claw won't snap over the rim, will leave you with a round jammed in the chamber if you force the bolt on top of it unless you pinch the middle of the extractor claw {some 98's might not allow this?}.

I just tried it with several Rugers, a 96 and a FN 98 Mauser and my CZ550. The 98, 96 and a couple MKII Rugers were best. A Ruger failed a couple times and the 550 didn't control the round at all. That cut away extractor claw on the 550 is a bugger!!

Fun with Guns!!