Hct4all
Since you stated that you're going to buy .357 defense rounds, I'm going to presume that they're probably going to be using 125 grain bullets. I say that because of the studies that have been made that suggest that that is one of the most effective bullet weights for that purpose. If so, then for practice, I'd pick up a box of either the Berry's or Ranier copper-washed 125 grain lead bullets. Load them in .357 brass, to prevent the possibility of powder-ringing the cylinder, and I use 700X with CCI primers. Don't try to drive them at factory velocities, 4.5 or 5.0 grains is good enough for practice. I like the 700X because I hate cleaning guns & it burns clean in that use.
900F
Since you stated that you're going to buy .357 defense rounds, I'm going to presume that they're probably going to be using 125 grain bullets. I say that because of the studies that have been made that suggest that that is one of the most effective bullet weights for that purpose. If so, then for practice, I'd pick up a box of either the Berry's or Ranier copper-washed 125 grain lead bullets. Load them in .357 brass, to prevent the possibility of powder-ringing the cylinder, and I use 700X with CCI primers. Don't try to drive them at factory velocities, 4.5 or 5.0 grains is good enough for practice. I like the 700X because I hate cleaning guns & it burns clean in that use.
900F