1500fps 158gr outta 6''bbl;these were the original velocities in 1935 but if I remember correctly the great Skeeter Skelton said about these loads that''they were hot as a depot stove''.He also mentionned something about the ammo manufacturers tuning them down a bit a little later on.
A .357Mag when shot from a N frame is not a hard kicker.My standard load for the .357 is a 166gr cast SWC pushed at a little over 1300fps with H110(chronoed in a few different 6''bbl guns)and some will show primers that are beginning to deform a bit.When shot from my K frame,while not yet a brute,it certainly gets your attention.From my 4'' N frame,it is almost a *****cat.

Please don't push your loads too hard.It is a .357 mag.If you want heavy kick,get a .41 Mag or anything bigger.Every gun has it's limits and when it fails,you might loose a lot more than just your pride.
Have fun and be safe!
Qc