Ruger 77tang safety extraction problem.

[cleg]

Have 77 tang safety. Went to do some reloading and with dummy round. It fails to extract, or only extract so far and extractor lets go of case. It will hook.on empties and seems to work just fine. I do need to trim bit off of cases, but coal length is short. Case sizing issue or extractor. It does seem to chew up rim on the case. Any ideas?

 

[Mobuck]

Need more info such as cartridge and age or previous use of rifle.
Does this happen with all brands of brass? Does this happen with new factory loaded ammo? Does the bolt close hard on the cases that don't extract?

 

[cleg]

.338 win mag, not sure of age of rifle 70-75105 serial number. Bought it used. It come with stainless muzzle break. I gently used a federal round it will extract out of chamber but drops it in mag well before full eject. Dummy round made with Remington brass, empties RP as well. Have not tried other brass at this point. It will extract federal empties no problem eject then clear if pulling bolt quickly. Extractor nick and scratches up rims.

 

[instructor]

From your description of what is occurring would say you have what is known as a "push feed" as opposed to a "controlled round feed*" rifle, newer style so to speak. The CRF version is basically a Mauser action which has a long claw type of extractor w/ mechanical ejection device inside rear of action, no spring/pin in the face of the bolt. Would try to replace your current extractor with new pin and spring, easy to do.
*The CRF system works well for the extractor of such rifle actions controls the cartridge case much better than the push feed version, but perhaps the spring in the pin in the bolt face is sluggish?? Worth a try.

 

[cleg]

Extractor is long claw causer type held in place by a clip that goes around bolt body.

 

[cleg]

Photos of bolt and extractor

 

[Mobuck]

The 'controlled round feed' design is meant to work properly with rounds fed from the magazine. If you're dropping a case in front of the bolt or directly into the chamber, this isn't the correct way to load.

 

[gunzo]

A 77 with a 70 prefix s/n is not a controlled round feed & if it was it doesn't seem to me to be relevant to extraction problems.

I am not a student of the claw extractor but before seeing a photo it really sounds like the extractor has a tension problem, or the inside of the hook is worn or rounded. But seeing the photo, it's hard to tell if the extractor is sitting into the face of the bolt quite enough. A visual of another 77 might help.

Aging memory tells me claw type extractors are adjustable by actual bending & thinking Brownells might even have a tool for this. If the extractor hook is sharp, not broken or rounded, I'd look for a Mauser mechanic or possibly a replacement extractor. Numrich-Gun Parts Corp. doesn't list one. Also, an afterthought, make sure the ejector plunger is moving freely. If it's stuck or sticky in the extended position it could be knocking the case off the extractor too soon.

Oh, another afterthought from someone that didn't grow up with this luxury,,,, bet You tube vids can be found on the subject.

 

[25-06 M77]

Tang safety M77s are NOT control feeds. How can anyone on a RUGER forum answer that way.
When the bolt is lifted it turns into position to hold the rim of the case stationary. check the extractor for wear
check for dirt or wear in the grove the extractor rides in. If those are ok i would be tempted to visit a gunsmith.

 

[cleg]

Thank you. Been looking for new extractor to see whstvisvout there, not much. Found couple Hawkeye extractor, understand it would work correctly, not 100% on that. Had a hunch this was not CRF style. Even loading from magazine it will feed then once it chambers it might pull case from chamber. 6 out of 10 times it will not. When it does work correctly ejector work great.

 

[oliver507]

Please post pictures of some of the problem pieces of brass. Close up pictures of the rims and bases might help.

 

[Paul B]

First off, that claw type extractor is a Mauser style extractor adapted to work on a push feed bolt. The tip has been altered just enough to let it slide over the rim of the cartridge case. Sometimes a bit too much has been removed and the claw will not hold the case to the point where the ejector will kick the case free of the rifle. I had a tanger M77 in 7x57 Mauser with that same problem and I had to replace the claw.

You can bend a spring a bit with a screwdriver and that will sometimes fix the problem. If it doesn't, a new claw will fix the problem. I used one from a 98 Mauser on mine bit ti took very care ffitting on the edge of the claw so that it would slip over the case rim. Just a slight polishing with a Dremel and Cratex tip.

My usually choice of rifle for a custom is a 98 Mauser or FN clone. I leave the claw alone unless it needs work and they rarely do. Well, at least the ones I ave don't need the work. So, regardless of what rifle I'm using on any particular day, I just load from the magazine. even with push feeders like the Remington M700s. Easy way to stay out of trouble.
Paul B.

 

[cleg]

I'll try and put up pics of case rims on Monday. I have found several mrk2 claw extractors even found one on midway USA, have read in few places it will work but may need to do little tuning. found actual one on Ebay for 7mmrm which would work fine, but they want a gold price for it, cheaper than gunsmith. looking at possibly getting needle files to try and hone original.

 

[cleg]

Pics of brass. 2 on left empty RP brass one on right is dummy round Rp brass does same thing to federal empty and loaded.

 

[cleg]

Scratches and gouging of rim.

 

[cleg]

Extractor. Definitely has uneven line on leading edge.

 

[oliver507]

A "good" bolt action Gunsmithing can hook you up very quickly!

 

[cleg]

Was hoping to save few dollars. Trying to just find replacement is sketchy at best. Did find one that come off a 7 rem mag it's $60 others are mid $30s but for mrk 2. Found one reasonable but is off of short action. I'll get it figured out.

 

[golferboy426]

The 'controlled round feed' design is meant to work properly with rounds fed from the magazine. If you're dropping a case in front of the bolt or directly into the chamber, this isn't the correct way to load.

I've loaded my 77's that way for decades (Dropping it in the chamber ) Never once have I had an issue. One in the chamber, 4 in the mag

 

[Mobuck]

^^The Ruger 77 is a 'modified' CRF which allows loading a round into the chamber but doing so still stresses the extractor more than feeding from the magazine.