This. And heat cycles using a carefully wielded torch or a heat gun.Kroil and patience
May help to know what lube, if any, was used when choke was installed?ideas
Photo of said tool please.I have a neat tool at work for this. It's two halves screwed together
Most likely the damage will occur due to compression / distortment of fine choke tube threads, from the expansion of the Brownells' tool.Although the choke may be damaged during removal, careful use of this tool should not harm the barrel.