I'll leave the question of "who should do the testing"? to those who know better than me but, I think testing should be mandatory for any rifle calibre. The following is a true, although slightly dramatised, dialogue of a conversation I witnessed amongst two guys in the pub on a Friday night a few years ago:
Hello Bert - what you bin up to?
Fox shooting.
Really, I've always fancied that, but I've never shot a rifle before.
You ought to apply for an FAC then.
Oh right, what calibre should I get, .22?
Nah, get a .243 in case you ever want to go deer stalking or something.
He applied and got a .243 !! ........... Frightening.
Now before you all reply and give me a lot of wellie regarding the finer detail of this post. The fact is the guy who got the authority to purchase the .243 is totally inexperienced but has access to a lot of land over which to shoot, he has no idea about what or when to shoot, would never even consider such things as a safe backstop, and if he did shoot a deer wouldn't know what to do next....some form of testing would have exposed this.