A curious question for the learned on here, If you wanted to shoot an antique Giffard Co2 rifle that you owned, Not a problem in 4.5 or 6mm calibre as these can be below the 12 ft lbs limit. But an 8mm calibre will obviously exceed this comfortably, This means putting it on an fac.
If one wanted to go down that road what "good reason" would you put down on your fac application or variation?
Background is i am a member of a rifle club & about to put in for an fac, I have two Giffards in 6 & 8mm flavours & would like to shoot both of them!