Mate.....
Go to the US on a weekend break, I'm on an annual course in Orlando and it's a regular thing now where the instructors take us to a range or two and blow 2-300 bucks on ammo!
The instructors each have a variety of pistols one guy has twin .45's (saving private Ryan pistol) so loosing off a couple of clips with one in each hand is just mental good fun.
If you pick the right range you can rent AK's, M16's, Mach 10's. You'll probably have somebody from the Sheriffs department in the next lane on a Saturday morning doing a revalidation......if you compare it to the UK it's a little surreal.
Once was next to an 85 year old Granny who could shoot the cock off a fly, she left and ordered up some special home defence ammo (the mercury tipped stuff that explodes on impact), couldn't help feel sorry for the punk who was going to climb her stairs in the middle of the night.
So do some research and get yourself stateside, so much more fun than over here.....it's a bucket list item IMHO