Be interesting to see what could be achieved with a 10 inch barrel? The factory HW k barrels are 12 inch so I'll stick with this for the time being. Yes JB venom did chop the 77 down..got a couple and they seem to be that little more accurate than the k and less pellets fussy. I think John Bowkett was a fan of chopping the full length 77's down also. Mach 1.5