Hi,
My S400 and hw77 loved them, HW101 not so much.
Extremely accurate and a trajectory that made 40yard 25mm targets very easy, could fit 25-40yard aim points comfortably in the kill.
But stopped using them as I found them inconsistent in the wind. Also, to get them running fast enough in a pcp to get the full advantage, heavy pellets will be too close to the legal limit.
It took me a long while to fully appreciate why most people use 8.4 grain pellets. Because they work.
si