I use an electronic scale. There's a beam scale sitting on the shelf as back-up. I bought one that is accurate to .02 of a grain, not that that level of accuracy is ever required. It was not the cheapest scale on the market but in the grand scheme of guns and reloading, it adds up to peanuts. The one I have has an AC adapter so I don't worry about batteries.
For the odd chore, like weighing brass, they are a god send. For most normal reloading, the balance beam will serve you just fine.
Oh, I've had my electronic scale for about 4 years and I weigh EVERY rifle charge that I load. So it gets lots of use. Absolutely no complaints so far, I love mine.