A nitrided SS barrel will have a longer life span than a non-nitrided SS barrel but you aren't going to get the same durability as a nitrided cut or buttoned 4150 or nitrited CHF "machine gun steel" barrel. Durability relies on both the treatment/lining + the base metal. If you have a weaker substrate metal you are going to get much faster barrel erosion once the propellant gasses eat through the treatment/lining in the thoat area and leade of the rifling.
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