Funny, I got one within the last month too. I'm not worried about the little machine marks and stuff either, but it is very interesting to see what the cleaning regime does and doesn't do. Especially with .22LR chambers that get crusty quick. We have club rifles that got to the point of not extracting because of the carbon ring buildup, other shooters I know have had same issue with their .223 service rifles.
One thing I noticed right away in the CZ 457 I just got was the incredibly deep rifling, deeper than any other rifle I've stuck the scope in so far, including my Kreiger match barrel. You can clearly see it comparing the CZ v Lilja barrel in the pics above. The CZ is the only .22 I have that the plastic storage rods I have to stand rifles up in the safes don't really fit. Had to cut one off and sand down to make the diameter smaller. Seems doubtful you could shoot one of these barrels out (especially shooting LRN bullets).
One thing I noticed right away in the CZ 457 I just got was the incredibly deep rifling, deeper than any other rifle I've stuck the scope in so far, including my Kreiger match barrel. You can clearly see it comparing the CZ v Lilja barrel in the pics above. The CZ is the only .22 I have that the plastic storage rods I have to stand rifles up in the safes don't really fit. Had to cut one off and sand down to make the diameter smaller. Seems doubtful you could shoot one of these barrels out (especially shooting LRN bullets).
