Joshua:
The term "loose" is quite relative. Some guns, of course, being more "loose" than others. And all in the opinion of the person who pronounces them "loose." If that person is an uncompromising pro, then his "loose" may well be shootable for a bit before the gun requires serious attention. In any case, Small Bore is correct. Get it fixed in the UK. He was probably too modest to suggest that the job is often done "better" as well.

Best, Kensal