I have reloaded 1000rds. of .357 sig. with .40 cal brass. If you haven;t actually done this you shouldn't post your opinion. I use roll sized brass from wolf, case lube from dillon, 124gr. aim projectile, 9.6 grs. HS6, small rifle primer, OAL 1.190, and a descent crimp. These are easey to load and function well. Power factor approx. 170-175 These are fired through STI open gun with a rechambered .38 super barrel