So, as you may have already read, I mounted the 22 LR barrel I bought here in the RFC Classifieds to my CZ 457. This was to convert from 22 WMR to 22 LR. As near as I can tell this is a factory CZ barrel. That is what the seller said. It looks exactly like the WMR barrel. All the markings on the barrel are correct. Other than engraved with a different serial number and 22 LR rather than 22 WMR, they are exactly the same.
As soon as I got the 22 LR barrel mounted, I chambered a round and ejected the round. That went perfectly. Though the bore looked shiny and clean I figured I should completely clean barrel before taking it to the range for sighting in.
I have a fine coated Dewey rod that I have used with all of my 22s for years. Most recently, it worked fine with both the Anschutz I recently bought and a recent cleaning of my CZ 452 American.
When I tried to use the same rod with the 457 in 22 LR, the rod got stuck in the barrel. With great effort, I managed to get it back out. Then I tried to run it down the barrel without a patch. Again it got stuck. this time when I got it back out I could see gouges in the coating of the rod. With that and how I had to go about getting the rod out, that rod is ruined.
So, next, I took the jag off that rod mounted it to another, less expensive and less robust rod I have from the days before I started using Dewey rods. That rod does not have the same coating as the Dewey rod. I mounted a dry patch. It went down the bore just fine. I mounted a wet patch, it went down the bore. I mounted a 22 LR brush. It went down the bore with a fair amount of resistance but it did not hang up.
So, It seems the bore in this barrel is too tight for a high quality coated Dewey rod.
Is this normal for the new CZ 457 American 24.8" barrels?
As soon as I got the 22 LR barrel mounted, I chambered a round and ejected the round. That went perfectly. Though the bore looked shiny and clean I figured I should completely clean barrel before taking it to the range for sighting in.
I have a fine coated Dewey rod that I have used with all of my 22s for years. Most recently, it worked fine with both the Anschutz I recently bought and a recent cleaning of my CZ 452 American.
When I tried to use the same rod with the 457 in 22 LR, the rod got stuck in the barrel. With great effort, I managed to get it back out. Then I tried to run it down the barrel without a patch. Again it got stuck. this time when I got it back out I could see gouges in the coating of the rod. With that and how I had to go about getting the rod out, that rod is ruined.
So, next, I took the jag off that rod mounted it to another, less expensive and less robust rod I have from the days before I started using Dewey rods. That rod does not have the same coating as the Dewey rod. I mounted a dry patch. It went down the bore just fine. I mounted a wet patch, it went down the bore. I mounted a 22 LR brush. It went down the bore with a fair amount of resistance but it did not hang up.
So, It seems the bore in this barrel is too tight for a high quality coated Dewey rod.
Is this normal for the new CZ 457 American 24.8" barrels?
