After weighing a couple of tins with the 4 scales I had interesting results.
I found that JSB 25.39 pellets will weigh from about 25 grain to 26 grain. That's right even though the majority fall in 25.3 to 25.5 there is enough weight different to give you flyers just from the difference in the weight alone.
Of the 4 scales I found that #1 scale is not consistent at all. Therefore that is money thrown away if you buy that one. Even weighing the same pellet over and over it might give different results often so I won't talk about it any more.
Of the other 3 scales I found that all 3 will give accurate result but I have my likes and dislikes about them as follows:
#2 scale which is the WAOWA TL series says on the box that it is a 50 gram scale. They make a 20 gram scale too but I have the 50 gram. I am amazed at how consistent it is. Drop a pellet on it and instantly it will give the same weight over and over and over. And its accurate too. It only measures to .1 of a grain but that is good enough. Of the other scales (not considering #1 scale) it is the least expensive. Cost less than $20. I would be satisfied to use it without hesitating. It's cheap price wise and it looks cheap but it is really accurate.
#3 scale is the Sharpshooter and it is a 20 gram scale. It too is fast and accurate. One thing I really like is that it measures two places to .05 of a grain. Everytime it will give a consistent accurate weight. Of the 3 scales it seems to be the highest quality made scale and maybe the most accurate. It comes in a very nice plastic case and the scale looks to be good quality. It has a large screen that stays lighted longer than the WAOWA before it times out if not used. Both the WAOWA and the Sharpshooter are battery only. Between the 3 scales this is my favorite scale. It's quick and consistently accurate.
#4 scale is the Lyman Micro-touch 1500. I bought this scale first of the 4 scales and I wanted it to be my primary scale. It can use either batteries or 110v. I like that a lot because it's always on if its plugged into 110v. Also I like the screen the best of the 3. It's the biggest, and it tilted on a 45 degree angle so that I can see it easy from sitting back in my chair. The other scales I need to look over top to read the screen. The Lyman is well made and looks good but here is my problem with it. When I weigh a pellet it seems like it can't decide what the weight should be. So if the WAOWA instantly says its 25.4 and the Sharpshooter instantly says its 25.40 or 25.45 then the Lyman might show 25.6 and then go to 25.5 and then after 2-3 seconds move to 25.4. Many times it will go back and forth from say 25.5 to 25.4 to 25.5 and then settle on 25.4. I found that the Lyman will give accurate results but it will try to fake me off with a weigh and then change the weigh a time or two before it settles on the accurate result. Therefore I'm not going to use it because it is no more accurate than either the WAOWA or the Sharpshooter and both of these are much faster.
If you want to weigh pellets on the cheap then go for the WAOWA. It will be accurate every time and fast. I like it a lot even though it looks cheap and is cheap. If you don't mind spending a little more money then go for the Sharpshooter. It is fast, accurate, weighs to .05, and looks to be the best quality product of all the others.
There you have it. You CAN get consistent results from all 3 of these scales (forgetting #1). Hope this helps someone decide what to buy if they want to start weighing pellets for more accurate long range shooting.
Cheers!