Bought mine new in .177 calibre - it never grouped ever! I might as well have bought a .410 as far as grouping went.
The gun was obviously intended for FAC outputs and maybe at those pressures "smooth-twist" actually works but it never did at sub 12 ft-lbs.
Also the most important bits on the rifle are disabled on the UK versions!
Complete and utter rubbish - it was gone inside 3 weeks and I for one will never buy another FX. Once bitten, etc, etc.
Steyr LG 110 2014; Steyr Pro X; Anschutz 9015 HP ; SCR Exile .177; FX X barrel .177 Aeron Streamline; Daystate Delta Wolf .177; Tau-Brno MK300 .177; Sportsmatch GC2 mk3 .177