I've searched through all 24 pages of this thread for "HW100" .177 and the results are as follows:

Ahem.
Cough.
Pause.

JSB Exact 4.52 - 10
Bisley Magnums - 4
JSB Exact Heavy - 4
AA Field 4.52 - 3
Mosquito 4.52 - 2
H&N FTT - 2
RWS Superdomes - 2
Crossman Premier UltraMagnums - 2
Weihrauch Magnums - 2

JSB Express, Mosquito Express, RWS Hobby Sport, Daystate Select 4.53, AA Field 4.51, Webley Lazer Domes, Barracudas, Weihrauch Select 8.4 all had 1 fan each.

Note: I did not distinguish between HW100 and HW100K or variants.

I just got some Exact 4.52 Heavies from Intershoot and they are a touch better than Ultra Mags/BisMags/Barracudas in my rifle. I have not tried Exact 4.52s - yet, but Exact 4.53s were just OK. Best of the rest for me are AA Fields. But I did test at 59 yards, which is tough on lighter pellets in any wind.