I've been reloading on a Dillon RL550B for YEARS! I hate to think how many rounds I've loaded on it, with zero hassles, and zero complaints. Right now I load for .45ACP, .45 Colt, .454 Casull, .38 Spec, .357 Mag, .223, .30-06, and 7mm-08. Can't imagine trying to keep up with a single-stage press, and the rifle ammo is as good as the pistol ammo.
And Dillon has the best customer service anywhere.