Hi Phil
Ive only removed the choke when the barrel would not shoot or group very well, and every barrel Ive had that done to has shown an improvement as obviously the issue was the choke, some can be polished but thats not the OP's question. I also have choked barrels that shoot very well to and theres no need to work on them, although as I said back a bit, my best barrels are chokeless.
Chris
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