{"id":2437,"date":"2016-11-04T15:43:00","date_gmt":"2016-11-04T14:43:00","guid":{"rendered":"https:\/\/www.saschaback.de\/blog_neu\/2026\/08\/06\/measurements-geco-233-ammunition\/"},"modified":"2026-08-06T13:48:10","modified_gmt":"2026-08-06T11:48:10","slug":"measurements-geco-233-ammunition","status":"publish","type":"post","link":"https:\/\/www.saschaback.de\/blog_neu\/en\/2016\/11\/04\/measurements-geco-233-ammunition\/","title":{"rendered":"Measurements Geco .233 ammunition"},"content":{"rendered":"

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\u00a0with a Lothar Walther 16,75″ barrel (described\u00a0with detailled specs here: DAR homepage – barrels<\/a> ) and compared to the values of my old STI Custom Competition rifle (also 16,75″ as far as I know Nordic barrel). I\u00b4ve measured the two Geco factory loads<\/a>\u00a0.223 55grs and 63grs (BC .55grs is 0.275 and 63grs 0.345)\u00a0.<\/p>\n

All values are fps<\/p>\n

DAR-15 IPSC<\/strong><\/span>
\nGeco 55grs<\/em>
\n3074, 3008, 3122, 3080 -> Average 3071
\nGeco 63grs<\/em>
\n2770, 2809, 2763, 2739, 2833 ->\u00a0Average 2783<\/p>\n

STI Custom Competition<\/strong><\/span>
\nGeco 55grs<\/em>
\n3056, 3012, 2988, 3059, 3097\u00a0-> Average\u00a03042
\nGeco 63grs<\/em>
\n2829, 2826, 2809, 2805, 2814\u00a0-> Average\u00a02816<\/p>\n

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