Never heard of it ....so checked it out...sounded interesting...until...holy shit, $10 per shot, on the web page! Cost more to shoot than Hornaday match grade 750 gr 50BMG anmo, with 13,000 to 14,000 ft/bs of muzzle energy, depending on barrel length.
Cost is ridiculous. No mention of barrel lenght velocity was taken, or subs available.
So I'll stick with the 510 whisper project, for this winter, and see what it will do with lighter supersonic bullets, in 350 to 400 grs, as well as the 10002 gr subs...and I thought $2 a piece for brass was high...but 650 gr fmj sutlrplus bullets are cheap, got thousands for 24 cents ea yrs ago, and 45 cents ea including shipping a few weeks ago...good for fun plinking.