that is not the case now. bullets (or heads as some people refer to them) need to be recorded on your FAC.
Sorry to disabuse you of that notion but expanding bullets do not need to be recorded on your FAC - the RFD will need to have a sight of it to confirm that it has the condition allowing possession of S.5 expanding on it, and he can therefore legally sell them to you, but there is no need for them to be entered.
It's specifically mentioned in the Home Office Guidance:
3.17 Category (xv) extends the prohibition
on the various types of prohibited
ammunition to the actual bullet or missile
itself, not just the complete round of
ammunition (a complete round consists of
the bullet, the cartridge case, the propellant
and the primer). Certain categories of shooter
such as deerstalkers and vermin controllers
are exempt from the requirement to obtain
the authority of the Secretary of State to
possess expanding ammunition (see Chapter
4) and will have the appropriate condition
entered on their certificate (see Appendix 3).
There is no need for the bullets to be listed
separately on the certificate, other than in the
circumstances described below. However,
where a certificate holder requests large
quantities of bullets, it should be remembered
that the total number of bullets authorised
counts towards their overall limit on
possession of expanding ammunition. The
exception to the rule on listing bullets
separately on a certificate applies in the case
of a certificate holder who wishes to possess
a variety of different types of bullets. This
may be reflected in a relatively higher
overall limit on possession and, in these
circumstances, the bullets may be listed
separately to help avoid unnecessary
stockpiling of complete rounds.
It is not
necessary for the dealer making the sale to
record transactions of expanding bullets on
the certificate but the sale should be recorded
in the dealer’s register.
A bit of discussion on the subject recently took place on this thread:
http://www.thestalkingdirectory.co.uk/showthread.php?21179-Ammunition-bullets