I have the Lyman Digital and when checked against the shipping scales at work it's proven to be accurate enough, at most only about 2% of deviation. The only issue that I have with it is that the range is limited to only 12 lbs. and some S&W revolvers ship with DA triggers that are over 12 lbs. This means you need to keep an eye on the reading and stop if you see it hit 12 lbs. because Lyman is pretty specific in the instructions that you not overload this gage.