Glad someone was able to post a pic. This is the way I've had my rebored/rechambered rifle marked.

Originally Posted by MuskegMan

Here's an example from one of my rifles. This was originally a .30-06 that was rechambered to .30 Gibbs by Mr. Ray Montgomery. Looks like it was milled out over the original marking and then remarked.

[Linked Image]

I never thought I'd grow up to be a grumpy old man, but I did, and I'm killin' it.