If you have a correctly sized down patch jag for your calibre and a cotton patch that completely covers the jag this is the way to go IMHO. Be very careful to cover the complete jag, you don’t want the jag dragging on the inside, it needs to push the patch.
A snug fit is required, but not tight so one could wrap a nylon bore brush in a patch and use that. A VFG expanding pellet patch and appropriate jag is also pretty good.
The patch will conform to the groove profile if a jag or wrap is used, be sure to completely remove the paste after application as per the instructions on the tub, and I have found that running clean patches on a jag after you think all the JB is removed is a good thing, continue to do so until they come out unstained.
A final finish with Flits also works, but you have to polish once again until you start pushing patches that draw out clean.
The CZ barrels are golden, they can be made legendary if careful preparations are done. I must warn that you need to ensure that your barrel only contacts the patch, whatever method is ultimately chosen, have seen plastic jags, they might be a better option overall.
Also good advice from Nervoustrig....