I reload all the time for my M31 357SIG never a problem. I only use jacketed bullets and I load my fun loads down to just a hair hotter than 9mm. I believe around 1050 to 1150fps.
I reload my self-defence loads right around factory specs. 1350 to 1400fps 124gr bullets.
A previous poster said you would never carry reloads for CCW, well, I disagree. I trust my loads much more than factory as I take care in loading them.
You should test your store bought ammo sometime as I have and you will see that it's not always good. Winchester white box ammo in any caliber was terrible for all kinds of flaws but, their QC has gotten much better and I have gotten some lately and was fine but you should test your ammo for loose bullets, primers sticking out too far, different calibers in the same box, you might be surprised.
Glock says not only do not use reloaded ammo in their guns but, also no lead bullets because of the rifling in the barrels fills up with lead after shooting awhile and causes high pressure leading to KB.
So....reload and pay attention to what your doing at all times while your reloading and you shouldn't have a bit of trouble.