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.
Pardini K12 full size, Pardini 12 ft lbs. 177 FT rifle (Factory 0018)
Daystate Redwolf GP stock 177. FX Streamline x Aeron FT stock 177