It is not overly easy to blow up your gun. While it can be done, you need to make a fairly gross error to do it. You can load rounds that are not good for it, that can be hard on the gun and eventually destroy it if you continue to shoot them, but to blow it up straightaway you would need a double charged case, and/or a squib in front of that one etc. Sure, it can be done, but not if you were careful and have a good safe load. With W-231 a double charge is easy to see. A double charge of W-231, 7.6+ Grs in this case, nearly fills an empty 9MM case and would be very noticeable to the naked eye when seating a bullet.
As others have posted and you proved to yourself, you cannot weigh the loaded rounds after the fact and gather any useful information on loaded 9MM round. You have to set everything up carefully, double check it all, and then load your rounds, eyeballing every powder charge you sat a bullet over. After that you just have to trust yourself.
Did you do those/these things?
Carefully select a safe starting charge weight? Check.
Lock the powder measure down on the setting that throws the charge weight you wanted and verified numerous times?
Eyeball each charge you seated a bullet over so anything too low or too high would be noticed and remedied?
Picked an OAL that will not only function, but will not be a lot shorter (For 9MM that isn't much) than the data you are using? (For those bullets I would suggest an OAL that falls between
1.160 & 1.165. (A .005 spread is pretty typical in 9MM by the way))
Adjust the taper "crimp" so that it completely removes the bell on the shortest cases, but puts no more than .001 inward "crimp" on the longest cases?
Were you focused on the task at hand during the entire reloading process?
If you do all of these things all you can do after that is trust yourself and go shoot them.
Being a little bit nervous about one's first reloads is quite normal, I know I was, but that changes very rapidly when they all go bang and hit where they should. Any previous trepidation is replaced by a big grin and the desire to run home and do it again.
Welcome to
THR.