I do use that Buffalo Bore load.
I personally chronoed the 158gr LSWHP out of my Ruger Speed Six at 1100 fps.
Yes that's Eleven hundred feet per second from a 2 3/4 inch barrel.
I higly recommend Buffalo Bore ammo.
I currently use their 'low flash short barrel' 125 gr DPX .357 magnum load in my S&W 2 1/2 inch 640-1 .357 Magnum. Chronos out at 1220 from that little barrel and I can shoot it one handed with good control rapid fire.
"The government has confiscated all of our rights and is selling them back to us in the form of permits."