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.
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I ordered one. I haven't had any issues in my four CZ's, but I wanted to have spares on hand if needed.Link for lazy folks: Exact Edge Extractor and Holder for CZ 457 | Volquartsen Firearms
Tempting to get one, but haven't any issues as of yet with my current one..
What headspace do you have your barrel set at? I suspect that a smaller headspace may increase probability of extraction.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.
.043. I shoot SK ammo for the most part.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.
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.