Re: 260 Brass
I think that as long as you stay away from seriously warmer loads, the Remington's primer pockets will hold up quite well.
I only recently bought my first Lapua brass, some 6mm BR Norma stuff. At first (and any other) glance, it appears to have the same quality as fine jewelry.
While I can take or leave such cosmetic advantages, my reloading guru (STP) suggested very strongly that the Lapua's primer pocket size and flash hole diameter gave it a marked advantage over the Remington 7mm Br that was retailing for the exact same price at Midway last week. We (or actually, he...) will be resizing it to 30BR for an upcoming FV200/250 project this Spring. It's danged good to have friends...
Greg