Say you have a carry gun that has passed your vetting process with defensive ammo, whatever number that might be. Now you have had it milled and installed an optic. Do you start the vetting process over again from zero, or do you run a lesser number of defensive rounds through it and call it good?
Is your procedure different for a direct milled slide .vs an optics ready model where you just bolt it on?
To be clear, I am not talking about proving the optic, just the reliability of the pistol after the optic install.