Tried them a few years ago Chris through a hw100, they seemed to suit that quite well, consistent 20mm at 55y unweighed.
H&n ftt current pellets are phenomenally made, very tight weight tolerance. The tins I had earlier this year had Very few outside a 0.2 grain spread. Grouping was good, but had the next tin out of the same batch where you would get a shot that went walkies for no apparent reason.
Ended up using barracuda match for most of this years ukahft series, but know they have changed profile now and latest batches of those don't suit my guns.