The Air Rifle section in Italian on the UKBR22 site is in fact a 'link', the Air Rifle info on the site can be found, in English, under the Rules section.
As has already been suggested, have a look at the scores spreadsheet with all the kit information on it.
I've been shooting a FWB P70FT modified by Jon Harris since the start of our AR competitions. Originally I was using JSB 4.52's which seemed fine on NSRA PL14 targets with a 15mm bull, were not up to the job of taking out a 2mm bull with any sort of consistency. I changed to Baraccuda Match, after realising the Italian guys were using them, and found their 4.51's do the job quite well.
I've got a pdf 20 diagram version of the UKBR22 target if anyone would like to try their hand, please shout if I can be of any help.

Cheers Robb H