I cannot argue regarding the drift or repeatability of the FX-120 when I have not tested my scale a FX-300 (same thing) against a
more accurate scale.
I believe that
@PracticalTactical is correct on the FX-120 after all it is a $600 scale and there are scales that cost
many thousands more.
Now in a practical sense here is some recent 223 data that I have.
I picked 223 because of all the calibers I load for it was very challenging trying to get low ES numbers.
Rifle is a Rem 700 with a Criterion remage barrel , 75gr Berger, tested on three different days .
Question is, would my ES improve with a better scale?
9/8/2021
Stats - Average 2836.65 fps
Stats - Highest 2838.55 fps
Stats - Lowest 2834.14 fps
Stats - Ext. Spread 4.41 fps
Stats - Std. Dev 1.75 fps
Shot ID V0 V10
1 2839 2818
2 2837 2817
3 2836 2815
4 2834 2814
5 2838 2817
9/17/2021
Stats - Average 2828.58 fps
Stats - Highest 2834.48 fps
Stats - Lowest 2821.29 fps
Stats - Ext. Spread 13.19 fps
Stats - Std. Dev 4.52 fps
Shot ID V0 V10
1 2832 2810
2 2829 2808
3 2834 2813
4 2830 2809
5 2824 2803
6 2821 2801
7 2828 2807
8 2834 2813
9 2825 2804
10/29/2021
Stats - Average 2814.95 fps
Stats - Highest 2823.79 fps
Stats - Lowest 2811.42 fps
Stats - Ext. Spread 12.37 fps
Stats - Std. Dev 4.61 fps
Shot ID V0 V10
1 2812 2792
2 2813 2789
3 2824 2798
4 2814 2793
5 2812 2791
6 2822 2790
7 2818 2796
8 2811 2790
9 2811 2789
10 2812 2791