The nickle cases look good and they stay looking good.
When they are ejected into the leaves or grass they are easy to find.

I bought a bunch of nickle.45 ACP cases just for that reason...they were easier to find at the gunrange. Unfortunatley, they are brittle and will crack after the 3rd or 4th reload. I shot them up until they were gone. The brass cases will outlast the nickel ones by several times.

If you tumble your brass before you reload them, they wont be a problem on dies.