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Additionally, to properly blend the contours, any other nearby desirable markings would likely be lost with the caliber designation.

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Oupa,
There is another way of doing this job which does not affect any other markings on the barrel.
The unwanted stamping is removed with endmill or slot drill, then a piece of steel is filed to perfectly fit into the milled recess with a small amount protruding proud of the barrel surface.
It is imperative that the insert fits perfectly and it is then peened slowly and gently with a small hammer to expand it into the recess.
It is then dressed off and polished and then the barrel is reblued.
When done correctly it is undetectable with naked eye inspection.
Works a treat but requires skill to achieve a perfect job.

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