I use both Lapua and Peterson brass and I can't say one is better than the other. They are so close in quality. I do prefer Peterson though. If for no other reason than it comes in an ammo box with each piece of brass separate from the others. Where Lapua comes lose in a box and while rare, I've had some of it dinged up. Of course someone who reloads in a year, what I will in a lifetime may have something different to say.