Maybe interesting for the one or the other – if you don`t have a chrony but you want to use a ballistic calculator – Here, some new measurements out of my new DAR-15 IPSC with a Lothar Walther 16,75″ barrel (described with detailled specs here: DAR homepage – barrels ) and compared to the values of my old STI Custom Competition rifle (also 16,75″ as far as I know Nordic barrel). I´ve measured the two Geco factory loads .223 55grs and 63grs (BC .55grs is 0.275 and 63grs 0.345) .
All values are fps
DAR-15 IPSC
Geco 55grs
3074, 3008, 3122, 3080 -> Average 3071
Geco 63grs
2770, 2809, 2763, 2739, 2833 -> Average 2783
STI Custom Competition
Geco 55grs
3056, 3012, 2988, 3059, 3097 -> Average 3042
Geco 63grs
2829, 2826, 2809, 2805, 2814 -> Average 2816
