Following on from a previous post I am going to get an Einstecklauf (liner barrel) for my Combination Gun so that I can use it as a double rifle for wild boar. Current rifle barrel is in 7x65R and the new liner barrel will also be in 7x65R. It will obviously have to go on my FAC, but before I ask the FEO has anybody any views on this. It's not an additional firearm so will I need to pay the costs. I am also going to ask for permission to hold Shotgun slugs for zeroing purposes and use on pigs and vermin (its a 16bore so not applicable to UK deer).