The best one I can think of will be the GemPro 250. I used it a handful of times to check my older RCBS beam scale. They work well and the resolution is down to 0.02 grain. Only issue I can think of is you have "numbers OCD" like me, and you hate seeing 40.28 when you're trying to get 40.26. They tend to drift a little, so you'll have to zero a few times, depending on how many charges you're throwing. I have one i'm not using, so if you're interested, let me know