my reloading book said I can get muzzle velocity of 1590 fps with 12.7g blue dot and 158g jhp
Maybe I misunderstood your original post. I went out and got some older loading data (Lee's Modern Reloading, 1996) and looked up the cartridge. According to the tables in that older manual the max load for a 125 jhp and Blue Dot is 14.5 grains for a max velocity of 1795 fps. That same table shows the max load for a 158 jhp to be 10.7 grains for a velocity of 1420 fps.
The most current data I can find from Alliant doesn't even show Blue Dot as an acceptable powder for the 125 jhp bullet in .357 magnum. The current data shows that for a 158 jhp the max charge is 10.2 grains of Blue Dot for 1188 fps.
For a variety of reasons, powder and data changes over time. This may be for product liability reasons, or it might be because the chemical composition of the powder has changed slightly.
I'm not going to tell you that you're in danger. As a prudent handloader you know your equipment and your data. There are times when I make an educated adjustment based on a long and knowledgeable experience with a particular set of data. However, what was considered safe and effective 14 years ago may not be considered safe and effective today.