I'm looking to push the Berger 7mm 180 bullets out of a 26" barrel at 3000 fps. It looks like the latest overbore crazy mags (28 Nosler, 7 RUM) can do much more than that. So what's a smart step down from those that will reliably hit 3000? Extra points for being a non-belted case and not having a rebates rim, but those are not total dealbreakers. The 280AI looks real nice but not sure if it's got the gas in the tank.