If all you do is check the powder throw from the Dillion a beam scale should be all you need. I need to break mine out and check my digital scale. The digital scale is supposed to check itself but I'm not sure if that's entirely possible. I think my beam scale is RCBS but I would have to check.
For pistol ammo it doesn't matter if you throw 0.10 grain +/-. For precision rifle ammo it matters. I load all my pistol and .223 with a digital Frankfort scale like this one.
Works fine for my needs.