Here is some perspective on hot 9mm ammo....
In the world of competitive action shooting, there is a rule called power factor.
If your ammunition achieves a higher power factor called "major", you are rewarded with more points.
Obviously everybody wanted more points, so eventually people started pushing 9mm to very high velocity with heavier bullets.

Then the guns started blowing up.

There are many old time combat shooters here in Honolulu who can tell you stories about themselves or their friends blowing up guns.
I've done it, and it ain't fun. (My story was a 38-45 Clerke wildcat)
The problem became so bad that the the governing bodies had to change the rules to lower the power requirements.
Today, people still use major 9mm, but the guns are built to take the higher pressure.
Your guns are not built to take the higher pressure, so it's just a matter of time before you blow yourself up.

In one last valiant attempt to post something relevant to what I initially put up, here is the cost breakdown of how much I saved vs buying loaded ammo. This was done with used brass and did not put any money into that category.

Prices are for the components I used in my OP. The price per round should drop even lower if you buy in bigger bulk and obviously, use less power than I did.