What CRF action to use as a donor?

[Clocked92]

Defiance makes a CRF action if you want to spend a bit more. Same caveat applies to the Dakota.

The Bighorn SR3 or TL3 likely would fit the bill as well if looking at custom actions.

 

[Dogleg]

The extractor of a CZ550 will not jump over the rim. Was helping a new shooter at the range with a shell stuck in the chamber of his brand new CZ 30/06. I could not get the extractor to jump over the rim, even by squeezing the back part of the extractor. The front edge of the extractor hardly had any bevel to it. I informed the owner that he can only feed cartridges from the magazine.
I'm going to have to dig out my 550 in 416 Rigby to see if it will single feed a dropped in cartridge. I can't remember if it does.

My 550 Magnums close on single loaded cartridges just fine.

 

[BigUglyMan]

Completely empty rifle.

We call those... "What Have You Learned Moments"!

 

[Dogleg]

My BRNO 602 and 600 will jump over the rim but I prefer to press on the extractor or just feed from the mag.

Even if you always feed from the magazine, sooner or later you will fumble a magazine top-up or otherwise accidentally get one out in front of the bolt. With the nose of the extractor properly shaped (0r reshaped) it'll slip right over and no problem. There's zero downside. On the other hand there is zero advantage to not being able to jump the rim. It's just a problem waiting to happen.

 

[pete dobinson]

I can single load my kimber, my m70 fn winchester and my pre 64 m70 winchester.

 

[porpoise]

My m70 alaskan wont close the bolt on a 30 06 cartridge if it gets out of the mag ahead of the extractor. My cz 550 would, in fact when i looked close every round was coming out of the magazine ahead of the extractor and the extractor would snap over it. Which is fine but then what is the point of contolled round feed? In fact whats the point of controlled round feed if it actually works?

 

[Leeper]

Some recent model 70's have had an issue with snapping over the rim. This is because the extractors are dimensionally flawed. The design should allow this. The Mauser Model 98 was designed to not snap over because Mauser had the idea this was a bad thing (?). It is easy to alter the extractor so this is not an issue. As far as the advantage of CRF is concerned, one only has to have acartridge jump out of the magazine and stovepipe one time to see where there might be an advantage. Now, I readily concede, if the magazine is right, this isn't likely to happen but this is the perception. CRF actions which work properly are an excellent system. Push feed actions which work properly are also an excellent system.
Mauser's concern, when the extractor system was developed, was to avoid any possibility of double loading if the bolt was withdrawn without being turned down in a panic situation. Perhaps this could be an issue or perhaps not but there it is.
As part of the CRF system there is also a stationary ejector which is pretty trouble-free. The exception is the P14 where the British managed to take the Mauser design and screw it up. The Lee Enfield (which is a CRF action) has probably the most durable and reliable ejector in the rifle world; a screw. I have also never seen a broken Mauser ejector or a model 70 ejector., for that matter.