GemPro-300

[T-shooter]

When using the GemPro-300, always set the pan down like a feather. If not, the readings will probably be off. Also the best way to trickle is to add powder, then reset the pan on the weighing platform again. When you zero the empty pan, not the negative reading when you lift it off. The reading should be the same after weighing a load and removing the pan. I had 2 GemPro-300's for testing. One seemed to be more accurate zeroing the reading TARE after each load, with the other one, it didn't seem to matter. When in doubt, reweigh the load. With care I could almost always weight within .04 grain. Here are a couple more test I did with the 300. Weighing the same weight 25 times resetting TARE each time.


Weighing several things 15 times each without resetting. The most in each category is highlighted in green, others in blue.

 

[Rich S]

I havent used the Gempro but have a Tree HRB 105. It is also a strain gage type scale. Mine does not drift much if it is warmed up an hour before using. It is very responsive to powder drops. It picks up single Kernals (0.02 gn) as fast as the fx120 or my Metler AM50. The Metler AM50 is a force balance similar to the fx. The Tree perfomed nearly as well when I compared them. For a budget balance the Tree HRB seems to be a good option. I picked mine up used on ebay fairly cheap.