Today I got myself a Wilson mag, and a boxes of Blazer ammo, then went to the range.
At first the last round wasn't seating into the battery. I only needed to push a little on the back of the slide to get it to feed. I think its just break-in issues? The last 4 mags fed smoothly for the most part! Except on the 2nd to last mag, where it had the same seating issue as how I described earlier in this thread. I still assume its just break-in "burps"?
Hopefully this gun is now fixed. Now I just have to finish breaking her in, then try HP ammo (Ill just get a ramp job done if it doesn't like HP rounds as is), then finally night sights.
Thanks to all of you that helped me with this gun!