Home Forums Hunting & Shooting Gunsmithing Tuning a Win Mod 70 Extractor

I have a Winchester classic with a weak extractor. The extractor does not hold the case as intended. What is the best procedure to tune or, who should I send the bolt body and extractor to?

Anyone?

Most any Smith should have the tools to adjust a Mauser or pre 64 Win extractor which is the same as a Classic, in general. But, the finished job should hold the cartridge case to the bolt face, when the bolt is turned outside the rifle.

The extractor adjustment alone, is simple, but can be more complicated if more than just the extractor is involved.

Suggest taking the entire rifle in to a smith for an examination.

When you say is not holding the case, at what point upon extraction is it "not holding the case"? Seems it should hold the case till extraction....flips the round out at the end of extraction. If it is dropping the round with a real slow extraction look carefully at the round and see if you can see what point it drops it. Something should be showing up that you can see.

The extractor does not hold the case to the bolt face as intended. I measured about .035 from the outer rim of the bolt face to the extractor. I think I am going to send the bolt body and extractor to Penrod and let him work it over.


I don't see how simply adjusting the "spring" tension the old fashioned way would help because the distance between the extractor raceway and the claw is fixed. Perhaps I am wrong...

The extractors job is NOT to hold the case to the bolt face. That is the job of proper headspacing the case. The extractors job is to extract the fired case/round. The rifle should fire perfectly without an extractor---you would have to manually extract (read poke out the fired case). If the rifle fires fine and extracts and ejects the case you are good to go.

Hip

I don't think you understand how a controlled round action is designed to operate.

Carry on.

Maybe worthwhile to be certain that the rim and extractor groove are within spec on your cases before modifying the extractor and/or bolt face.

Just curious....what cartridge is the rifle chambered for?

I may get some of the accepted terminology wrong here, but will do my best. The distance from the lug on the extractor which snaps into the groove on the bolt is fixed. If that groove is too far forward, the hook of the extractor will end up too far from the bolt-face for the typical rimless cartridge. This will effectively reduce the amount of primary extraction. I have see many newer Model 70 rifles which exhibit this flaw. BACO denies that the flaw exists. I measured some pre-64 Model 70's, a Model 54,some and model 70 Classics from New Haven. All had the groove located the same distance behind the bolt face. Newer Model 70's, from BACO, had the groove located at least .025 further forward. This flaw is not repairable without either using an extractor with the hook located closer to the lug or altering the groove on the bolt. GD

That's interesting. Makes me wonder if this is design feature with the more recent WSM chamberings to avoid binding.

Excellent explanation. Most don't savvy that primary extraction is also reduced by the amount of misposition. As this happens over the entire sweep across the cam angle, it's pretty significant.

Good shootin' -Al

I may get some of the accepted terminology wrong here, but will do my best. The distance from the lug on the extractor which snaps into the groove on the bolt is fixed. If that groove is too far forward, the hook of the extractor will end up too far from the bolt-face for the typical rimless cartridge. This will effectively reduce the amount of primary extraction. I have see many newer Model 70 rifles which exhibit this flaw. BACO denies that the flaw exists. I measured some pre-64 Model 70's, a Model 54,some and model 70 Classics from New Haven. All had the groove located the same distance behind the bolt face. Newer Model 70's, from BACO, had the groove located at least .025 further forward. This flaw is not repairable without either using an extractor with the hook located closer to the lug or altering the groove on the bolt. GD

Exactly...


Geez....... You have NO idea what you're talking about..

375 H&H Classic Stainless held snug by extractor

Perfect!

It has to hold it otherwise it wouldn’t be called a “controlled” feed. The spring tension that is exerted by the claw against the extractor groove of the case will then hold the loaded round against the bolt face and PREVENT the case from slipping out of the bolt face if the bolt is ever stopped before the round is fully chambered and or as the case is removed from the chamber.

To the OP…
Look at the shape of the extractor and watch as the case rim latches on to it. Is it holding on to the case?The extractor cut in the receiver, does it have some extra room, to let the extractor move out and around the rim of the case ?

Yep, that's how I like mine.

Grab the bolt and whack on the end of the extractor with a hard mallet till it works right! SMILE— not really, DON’T DO THAT—EVER!!!
Just couldn’t resist. You know you thought it!