Brass head stamp change/removal possible?

[BudRow]

Take one of these cheap vibrating engraving tools with the carbide tip and deface the factory marking.

[gnoahhh]

Personally, I wouldn't do a thing about it. Anyone who knows what a 45-90 IS will not mistake one of your 40-82s for it. Neither cartridge is remotely common. When you get older, you can't read head stamps anyway without help

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This.

[TCLouis]

Will not give you the 40-82 headstamp, BUT may be one of the few uses for a Dremel tool around firearms.
Judicious application of a bur and 45-90 will be gone.
OR
find a small number punch set and try overstamping the original 45-70 stamping.

[Dapaki]

Will not give you the 40-82 headstamp, BUT may be one of the few uses for a Dremel tool around firearms.
Judicious application of a bur and 45-70 will be gone.
OR
find a small number punch set and try overstamping the original 45-70 stamping.

I second the overstamping.

[dtknowles]

I don’t know for sure, but wouldn’t think that chucking it up in a lathe and cutting a single shallow groove through the current headstamp would affect casehead integrity. I’d try a very narrow strikethrough rather than totally obscuring it. The big problem is that you have no way to test it other than in the gun, which I assume you’d rather not sacrifice in the process.

This is the right idea. In Nonte's book he describes a tool used in a drill press that does the same thing. I use a vibro etcher to scratch out the old headstamp. I only mess with the part that is the cartridge's name