Mod'ing Barnard Extractor for Norma Dasher?

[FatBoy]

Does anyone have a pic of two of how they shaved/modified the extractor on a Barnard so the cases can be pulled off the bolt face? Mine clips on and extracts fine but the extractor hoods onto the case like it owes the bolt money.

 

[FatBoy]

Here is a pic of what the extractor is doing to the brass. Brass rotates out about 20° then hangs up.

I assume I just need to stone some off the bottom of the extractor tooth, making the gap from the bolt face to the tooth taller, but I have never had an issue like this so I'm hesitant to touch it.

FWIW, I ordered another extractor kit from Whidden, just in case I screw the pooch on this one....

 

[DaveTooley]

It's been a long since I've had a Barnard action through here but my guess is the problem is the interface of the extractor and the case extractor groove. As the case pivots the extractor groove hits the top of the extractor. With a tight fitting counterbore the case can't move away from the extractor and gets trapped against the opposite side of the counterbore. I would look at relieving the contact patch on top of the extractor.

 

[FatBoy]

Thank you, Dave. If I am thinking of this correctly I would trim (stone) the red line in the pic below to make the extractor groove larger top to bottom, giving the rim of the case a little extra room to pivot in the groove, correct?

 

[Alan Warner]

Start with radius ing the outer edges of the extractor along with a cratex polish.
If that still presents a problem, narrow the extractor by 25% (equally on both sides and only as deep as the bolt face) and radius again.
The sharp corners on the extractor are digging into the brass when it is trying to get out, most likely.
Alan

 

[FatBoy]

Pulled the extractor out, hit all the sharp edges [and damn were they were razor sharp] and polished the top (chamber end) of the groove as well as the sides of the groove where it meets the extractors left and right edges, smoothed it a little is all.

I just ran 20 pieces through and only two had any drag at all, but they popped right out without marking the brass and didn't require any wiggling. It still grabs, extracts and released 6BR brass just fine too.

I had a hard time measuring with calipers but I would be shocked if I took more than .002" off any surface.

Advice from two Titans in the industry. I can't thank you guys enough.

Chris

 

[lloydx2]

Nice to see it worked out Chris. A good friend of mine runs a Barnard.
You could shave with the extractor.