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Volquartsen CZ 457 extractors

5.5K views 32 replies 19 participants last post by  BadaBing11  
#1 ·
Just received a notice from Volquartsen they now have improved extractors for the CZ 457 and some earlier models. For those having extractor problems just thought I would pass it on.
 
#10 ·
#14 ·
Well I did get this in yesterday and am not super impressed with it. I waited till I started having ejection issues with factory parts then changed it and it mad it worse. Factory I would get an average 3 0f 10 while the VQ would fail to eject 6 of 10 so that was way unacceptable. Pulled them back out and worked the tension spring a little bit and installed the factory parts back in and it clears the the action a good 1-2 feet and no more baffling ejection issues. :)
 
#16 ·
I found that extractor spring can get stretched pretty easy. I was using spent brass as snap caps when I was adjusting the trigger on my 457 . I repeatedly closed the bolt forcing the extractor to go over the rim edge . The extractor spring stretched out , reducing extractor tension . I replaced the spring and stopped single feeding . Problem solved . Finding the springs is a bear . CZ has really dropped the ball on parts imo. I’ve been on a waiting list for months . I finally found springs in Europe.
 
#20 ·
I found what might be a reason to switch to a Volquartsen extractor... after switching from an MTR to a Lilja barrel, I am now unable to extract a live round from the chamber. With a headspace of 0.041", I have had no issues with extraction of fired cases with the 700+ rounds of SK/Lapua that I have put through the barrel so far. The failure to extract live rounds seems to be normal for Lilja barrels though from what folks have reported in the past, so perhaps it's by design.

Does anyone have a rifle setup with both the Volquartsen extractor and a Lilja barrel (with ‘Lilja 3’ chamber) and can attest if the extractor is able to remove unfired live rounds from the chamber?

Not super critical, but is something that I would like to fix for safety reasons.
 
#22 ·
I installed the Volquartsen in my 457 with Lilja barrel. Live rounds will extract on a cleanish barrel. It gets dicey when the barrel isn't so clean.
What headspace do you have your barrel set at? I suspect that a smaller headspace may increase probability of extraction.

Looks like I'll be picking up a Volquartsen extractor after all.. if only to improve the odds of extracting a live round.
 
#27 · (Edited)
Installed my Volquartsen extractors and took them for a test run at the range and got some interesting results.

To answer my original question, whether the Volquartsen extractors will extract a live round from a 0.041" headspace Lilja barrel/chamber, the answer is yes (on my rifle). With the Volquartsen extractors installed, I have 100% success in extracting unfired SK and Lapua ammo that I wasn't able to extract with the factory extractors. Extraction of unfired rounds was successful even after putting 500 rounds through the barrel.

What the Volquartsen extractor didn't do on my rifle however, is extract the fired brass casing out of the action. Instead, 70% of the time, it was ejecting the casing directly upwards, which was causing it to hit the rail before bouncing around and more often than not getting stuck inside the action.

Upon investigation, I believe I found out what is going on. If you compare the two extractors, you will see that the factory extractors have an additional chamfer at the bottom tip of each arm. Here are some comparison photos between the factory (black, left) and Volquartsen extractors where the additional chamfer is called out:
Image

Image


After grinding similar chamfers on the Volquartsen extractors, I was able to change the behavior to make the brass eject to the right and out of the action:
Image

Image


Note that this modification did not impact the extractor's ability to extract unfired rounds from the chamber.

Additionally, I found by accident that grinding a smaller chamfer on the left arm (last photo, less-pointy one) would cause the brass to eject both to the right and forward while a slightly larger chamfer on this arm results in the brass ejecting straight to the right. My suspicion is that this could be used to fine tune the direction and angle with some trial-and-error.
 
#30 ·
Installed my Volquartsen extractors and took them for a test run at the range and got some interesting results.

To answer my original question, whether the Volquartsen extractors will extract a live round from a 0.041" headspace Lilja barrel/chamber, the answer is yes (on my rifle). With the Volquartsen extractors installed, I have 100% success in extracting unfired SK and Lapua ammo that I wasn't able to extract with the factory extractors. Extraction of unfired rounds was successful even after putting 500 rounds through the barrel.

What the Volquartsen extractor didn't do on my rifle however, is extract the fired brass casing out of the action. Instead, 70% of the time, it was ejecting the casing directly upwards, which was causing it to hit the rail before bouncing around and more often than not getting stuck inside the action.

Upon investigation, I believe I found out what is going on. If you compare the two extractors, you will see that the factory extractors have an additional chamfer at the bottom tip of each arm. Here are some comparison photos between the factory (black, left) and Volquartsen extractors where the additional chamfer is called out:
View attachment 421369
View attachment 421370

After grinding similar chamfers on the Volquartsen extractors, I was able to change the behavior to make the brass eject to the right and out of the action:
View attachment 421371
View attachment 421372

Note that this modification did not impact the extractor's ability to extract unfired rounds from the chamber.

Additionally, I found by accident that grinding a smaller chamfer on the left arm (last photo, less-pointy one) would cause the brass to eject both to the right and forward while a slightly larger chamfer on this arm results in the brass ejecting straight to the right. My suspicion is that this could be used to fine tune the direction and angle with some trial-and-error.
Installed my Volquartsen extractors and took them for a test run at the range and got some interesting results.

To answer my original question, whether the Volquartsen extractors will extract a live round from a 0.041" headspace Lilja barrel/chamber, the answer is yes (on my rifle). With the Volquartsen extractors installed, I have 100% success in extracting unfired SK and Lapua ammo that I wasn't able to extract with the factory extractors. Extraction of unfired rounds was successful even after putting 500 rounds through the barrel.

What the Volquartsen extractor didn't do on my rifle however, is extract the fired brass casing out of the action. Instead, 70% of the time, it was ejecting the casing directly upwards, which was causing it to hit the rail before bouncing around and more often than not getting stuck inside the action.

Upon investigation, I believe I found out what is going on. If you compare the two extractors, you will see that the factory extractors have an additional chamfer at the bottom tip of each arm. Here are some comparison photos between the factory (black, left) and Volquartsen extractors where the additional chamfer is called out:
View attachment 421369
View attachment 421370

After grinding similar chamfers on the Volquartsen extractors, I was able to change the behavior to make the brass eject to the right and out of the action:
View attachment 421371
View attachment 421372

Note that this modification did not impact the extractor's ability to extract unfired rounds from the chamber.

Additionally, I found by accident that grinding a smaller chamfer on the left arm (last photo, less-pointy one) would cause the brass to eject both to the right and forward while a slightly larger chamfer on this arm results in the brass ejecting straight to the right. My suspicion is that this could be used to fine tune the direction and angle with some trial-and-error.
 
#29 ·
I actually ordered another set of Volquartsen extractors because I thought that maybe I just got a bad set or something, but it was the same deal. Ejecting straight up and into the scope mount just to fall back into the action. I do have the first set working very well and it does extract a live round from a Lilja barrel, when headspace is set on the tight side. I headspaced for SK, which runs about .043 and it works with Eley as well.
 
#31 ·
Thank-you for the details on this procedure. My V parts eject the case to the left. As I slowly bring the bolt to the rear I see that the fired case is controlled by both the ejector and holder with the fired case angling to the right, but as I further retract the bolt the case ejects left. I followed your directions on the ejector (to no effect), but I cannot see chamfering on the holder in the last photo. Please elaborate a bit. Thanks, Brooks
 
#32 ·
Casing ejecting to the left (if it is actually doing so, and not due to it first hitting some other surface and bouncing around) could be due to a number of factors, including imbalanced spring tension between the extractor arms, too small of a chamfer on the left arm, too large of a chamfer on the right arm, defective extractors where both arms are of incorrect length, or swapped extractor arms. The last two are unlikely as you mentioned that the casing is correctly angling to the right before contact with the ejector.

The modification that I described in my earlier post effectively reduces the grip the extractor arms have on the casing, which results in the casing being released sooner after contact with the ejector. The ejection mechanism itself is a delicate balance between multiple components, which eventually results in the casing ejecting up (ejector contacts bottom left of casing) and to the right (left arm loses grip on casing before the right arm does).

I would recommend just taking it to a gunsmith and have them take a look at it.
 
#33 ·
Its normal for Liljas to not be able to extract a live round . Same goes for a lot of other match rifles . I don’t know of a Vudoo that will extract a live round . My Modacam CZ will not either .

Wait til you start hearing positive reports on the VQ replacements. Right now it seems like mostly negative .