Ammo reloaders weighing powder to a kernel RCBS10-10 vs Analytical Balance

In this demonstration we are going to show ammunition reloaders wanting to weigh powder to a kernel they need to purchase an analytical balance that increments in 0.002 grain divisions/graduations. That is two thousandth of a grain.
Now just because a balance offers readability to 0.002 grain divisions/graduations does not mean it is accurate to +/- 0.002 grain. Readability is just what the balance's displays resolution. One needs to dig into the manufacturer's specification and look for the word "linearity" which is the accuracy of the balance. Depending on the manufacturer the linearity is +/- 2d, 3d or some low cost Chinese made balances it could be 4d or 5d. In this video we will be using the Sartorius Entris64-1S and the linearity is stated as +/- 2 divisions. The Entris increments in 0.002 grain divisions so the linearity is +/- 0.004 grains. These manufacturer specs are performed by the manufacturer and done in controlled environments (temperature & humidity controlled, no static electricity issues, no radio frequency interference, perfectly stable air so there are no drafts). You have to have faith the manufacturer is honest in their testing and we have seen over and over again the no name brands stated specs do not correspond to the performance of the balance. Since testing is done in ideal environments you really can't expect the same performance and let's just say if the manufacturer states +/- 2d with your environment you'll get +/- 4d.
A kernel of Hodgon H4350 weighs between 0.020 - 0.030 grains per kernel. Each kernel weight varies. So for the Sartorius Entris64-1S I like to say when you have your balance level, balance warmed up for at least 30 minutes, in a stable environment realistically you'll expect to have accuracy to 0.008 grains (0.002gn x 4d = +/-0.008gn). Now if you purchased a milligram balance the readability and linearity would be 10 times less of an analytical balance so the best performance you could expect is 0.08 grains. If a kernel weighs between 0.020 - 0.030 grains per kernel there is no way a milligram balance can deliver the consistent weighing results the competition benchrest shooting is looking for which is knowing each round of ammunition has the same amount of powder. Having ammo with an extra kernel or short a kernel will result in the bullet being high or low of the target's bullseye .
The RCBS10-10 mechanical beam scale finest graduation is 0.1 grains. The large poise increments in 10 grain divisions, the cylindrical micrometer poise has graduation to 0.1 grains and uses a gauge that increments in 1 grain divisions. One 360 degree rotation of the micrometer poise yield 1 grain.
If we say the average weight of a kernel of H4350 is 0.025 grains then 4 kernels weigh 0.1 grains, which is the best readability the RCBS 10-10 offers. It is not the accuracy since you are moving parts, friction points and the agate bearing the fulcrum pivots on wears. We'll use the Omega 2 Speed Powder Trickler from Daddy Products available at www.omegapowdertrickler.com and we will dispense one kernel at a time to see how many kernels it takes to move the beam of the 10-10. Now watch closely as I drop one kernel while also looking at the beam pointer. I am going to press the BLACK button on the Omega Trickler and drop 1, 2, 3, 4 5 kernels. You'll notice it takes 4 to 5 kernels to see the beam even move. If you are doing any competition shooting and weighing powder with the 10-10 and other shooters are using an analytical balance you can see you are at a great disadvantage.
Now we will show you how to achieve weighing powder so you know each round is weighed to the kernel.
For many years those competition shooters wanting to weigh powder to the kernel purchased the Sartorius GD503 from Precision Weighing Balances at www.balances.com. The GD503 was discontinued in 2012 by Sartorius. Once the GD503 were sold out Precision Weighing balances alternative to the GD503 was the AND HR100a and finally in May of 2014 Sartorius re-entered the market with an affordable analytical balance called the Entris Series. The Entris64-1S weighs up to 926 grains & increments in 0.002 grain divisions.
We will now show you how the Entris64-1S can weigh to the kernel using the Omega 2 Speed Powder Trickler.
In closing if you need any balance visit either of Precision Weighing Balances' website at either www.balances.com or www.scaleman.com where you can buy the Entris64-1S. Omega 2 Speed Powder Trickler from Dandy Products available at www.omegapowder...

[@GeorgeWestbrook-v9m]

My lyman ohaus balance beam scale in use since 1966 ($16.00), clearly indicates adding a single kernel of h-4350 to the pan. 5 kernels constitute 0.1 grain. The scale is positioned at eye level to eliminate parallax. I motorized a lyman trickler with a foot control to deliver a kernel or a few to a thrown charge.

[@user-dr7pb8ek7g]

It was of great interest to me. Nice job!

[@Howlin23]

$100 scale vs $1000 scale...id hope there’s a difference in the Sartorious.