This is escalating.

A post on the Stirton forum from a well connected and trustworthy poster who deals with these matters for the British Pistol Club, and who advises the NSRA, is saying, that the NSRA have told him they have been told to sieze five shots taken into the LRC at Bisley for use or repair.

He advises:-

THAT UNTIL THIS MATTER HAS BEEN RESOLVED WITH THE HOME OFFICE DO NOT TAKE FIVE SHOTS TO THE LRC AT BISLEY.

I would further advise that it would be un wise to advertise one until this is resolved. Yes it is crazy, but stay calm, and keep quiet!