Then there are those of us who always tumble/clean our brass before reloading.
Are you suggesting I don't clean my brass? If you are,then you don't know what you are talking about.
When you clean the grti off your brass in the tumbler,where does the grit go?
Do you change your media after every use?
I have used brass laps to slightly enlarge holes to fit a pin,ansd brass laps with diamond paste to polish mold cavities Why do you suppose we use brass?
Because the grit embeds in the brass.It does not just sit on the surface.Grit embeds and becomes a cutting tooth.
I have ripped the very hard recast surface of EDM finish off plenty of hard tool steel using brass and lapping compound.
IMO,its easier to get all the grit off the harder,slicker nickel.
That said,I don't typically buy nickel brass.It IS easier to find ejected nickle 38 Super brass.
I had more than one 7mm Rem rifle The Husky had a chamber shoulder headspace cut deeper than the M-70.
I size to headspace on the shoulder..I was shooting the Husky less,so I bought a lot of nickel 7mm Rem brass for the Husky.
It was more difficult to load,but far easier to keep track of.