I would be interested to hear more about what sounds like another piece of bureaucratic lunacy. Hunting laws in Germanyprohibit the use of some types of bullet (and indeed some calibers, depending on the game classification) that cannot provide a clean kill. But there is no danger of a poor, injured target slowly bleeding to death.
The EU-excuse is the standard smokescreen put up by Britishbureaucrats who do not actually have a solid argument for their latest attempts to make life difficult, relying on the fact that Joe Q Public does not know any better. If you lived in my neighbourhood, I would happily bet you a beer that no-one can produce an EU Directive that states that bullets suitable for hunting may not be used for target shooting.