Maybe interesting for some of you -here are some Chrono results of some .223 Ammo out of the 16,75″ STI AR. First measurement I did outdoor in Philippsburg with a L&S Chrono, second one was indoor with a Chrony with LED lights. The noticeable differences between both measures may result of different comps (nordic tac / L&S vs. Arredondo and Chrony) or maybe my Chrony measures a little bit fast. Truth maybe anywhere in the middle…
| Marke | fps | fps | fps | Avg. | m/s | Faktor | Gerät |
| TopShot 55grs | 3005 | 3014 | 3009,5 | 918,67 | 165,52 | L&S | |
| Geco Target 55grs | 2962 | 2962 | 0 | 162,91 | L&S | ||
| Remington UMC 55grs | 2962 | 2860 | 2911 | 871,73 | 160,11 | L&S | |
| Wolf 55grs | 2821 | 2820 | 2820,5 | 859,54 | 155,13 | L&S | |
| PMC Bronze | 2663 | 2562 | 2612,5 | 780,9 | 143,69 | L&S | |
| S&B 55grs Schütte | 3035 | 3088 | 3083 | 3068,67 | 941,22 | 168,78 | Chrony |
| Geco Target 55grs | 3036 | 3039 | 3031 | 3035,33 | 926,29 | 166,94 | Chrony |
| Wolf 55grs | 2940 | 3007 | 3040 | 2995,67 | 916,53 | 164,76 | Chrony |
| Geco Target 63grs | 2787 | 2904 | 2832 | 2841 | 885,14 | 178,98 | Chrony |
Concerning precision, the Geco 55grs and 63grs and the S&B 55grs Box are my favorites at 50m. At 100m, the Geco 55grs looked best, S&B I need to test on 100m.