I guess some Forces are very pedantic , I`ve got a collection of arms including muzzle loading revolvers , .22lr ,.22wmr, .204 , 45-70 , sect 1 shotgun, 308. etc etc, my FAC just states
"The firearms and ammunition shall be used for shooting vermin and ground game/fox/deer and any other lawful quarry and for zeroing on ranges , or land and over which the holder has authority to shoot"
No other conditions except a bit of waffle about expanding ammo , I`m confident I`d get a 338 if I wanted one with no restrictions , I have held an FAC for more than 25 years so maybe I`m now deemed responsible
So stalking with my .22lr it is ,