I usually weigh mine on a little digital scale. Not really necessary but it's pretty quick and easy to do. I sure wouldn't recommend anyone do it with a balance beam scale. Tried it once - slow and a real hassle.

I agree with you about wrinkled balls hawkeye. I never could detect any real difference at the 50 yard mark. But I want to do some 100 yard shooting and feel better knowing I'm shooting balls that are all within a half grain of each other.

I always discard the light balls. They probably have air bubbles that could affect balance. One of my seven discards weighed only 221.1 grains. That's really light but the ball didn't look bad at all.