Re: .30 cal for deer in the UK
I would suggest that you make your local Firearms Enquiry Officer aware that you want your .308 for stalking local Red Deer,
also advise him on the weight of the local deer, as opposed to the weight of Scottish beasts, I've personally shot Norfolk deer that have exceeded 375lbs gralloched out(hide on). A farmer friend ran into exactly the same situation as you, he was having problems with Reds but failed to mention
this on his application, FEO assumed he wanted to shoot roe
and turned down his application for a 308, one phonecall
explaining the weight difference, roe buck clean 45lbs ave.
and everyone was happy!