They're my pellet of choice in the walther... group very well... i prefer to size and weigh mine, and keep them in a tin with a little napier on the foam pads... but i'm getting single pellet width strings in the wind, and they're basically going where I can put them.
I think Andy Gillott used them in his steyr to win the GP series.
I find I need to tweak the power a tad to make the most of their speed within the legal limit, but I still steer well clear of it, running them at a shade over 800fps...
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep