Each will react a little different I would pick one brand and stick with it. Case capacity will very between manufactures so pressure will be different which means FPS will be too. If you want good 270 brass try Nosler more exspensive but very good stuff. It comes ready to load! Weight sorted, chamfered,deburred. Just add a primer and powder. It is some thicker than most others so start low and work up watching for pressure signs. Most great reloads don't take place at Max IMO.