Velocity is claimed to be 1310 fps from a ten inch non-vented barrel in the 2019 Fiocchi catalog
http://www.fiocchiusa.com/
However, I question that velocity after quickly finding an obvious error in their ballistic table. Also, most of the .357 Magnum velocities listed seem rather low for such a long test barrel.
I doubt one will find much gel test information on this particular ammo, but it could potentially perform like the Hornady Custom 140 gr. XTP @ 1350 fps or the Winchester 145 gr. Silvertip @ 1290 fps.
Please share any future results you might have with this unusual load.