Originally Posted by BountyHunter
Absolutely no machine possible afterwards such as recrowning etc. Better have it right before meloniting.
Not true. I have barrels that have been salt bath nitrided (melonite treated) by both MMI and H&M and either can be altered if carbide tooling is used.
But you are correct, it's better to have everything 'right' to begin with. I've been having barrels melonite treated for the past 4 or 5 years.