I know you were all waiting with bated breath . . . here's the final test and comparison.

The S_S parameter controls the "Scale sensitivity timeout time in m/s" when using the slowest speed.

How did the Hornady LnL PM perform vs two runs by the Chargemaster using a S_S=255 vs S_S=128, the factory setting?

Powder: H335
Target: 40.0gr [40.0gr; 12 levels from 43.2gr to 47.1gr, 0.3gr or 0.4gr apart].
Total Loads: 50 [50; 10 x 3 loads, 2 x 9 loads, total 48 loads).

The powder measure was mounted alone on a LnL AP press, and a 308 case was used to activate the powder measure.

According to the A&D FX120i, how did the Hornady do?

Loads within +/- 0.06gr of target = 44/88% [43/86%; 33/68.8%]
Loads within +/- 0.1gr of target = 48/96% [49/98%; 41/85.4%)
Loads not within +/- 0.1gr of target = 2/4% [1/2%; 7/14.6%]

When missing the target load, by more than +/- 0.1gr, how far off was the Hornady?

-0.12gr, -0.12gr [+0.16gr; +0.5gr, +0.12gr, -0.12gr, -0.14gr, -0.16gr, -0.32gr, -1.04gr]

Does the Hornady miss more often High, or Low?

Exactly on target: 6 [9; 4]
Higher than target: 19 [24; 18]
Lower than target: 25 [17; 26]

My Conclusions, YMMV:

- Who knows if these 50-throw samples are representative of longer term performance?

- When using a powder KNOWN to be "good metering" like H335, the Chargemaster did not dispense more accurately than a good powder measure consistently operated, and may well be less consistent.

- Changing the S_S parameter from 128 to 255 may improve accuracy and shift the balance of inaccurate throws from slightly low to slightly high.

- Had I known this beforehand, I might not have bought a Chargemaster or any other dispenser/scale because I primarily use ball/flake and short-stick powders.

At some point I'll test how short and long stick powders (eg N-140 and IMR4350) compare, but for now I'm tired of throwing powder . . . and hoping the snow melts soon so I can move on to shooting