different weight defensive bulllets

[357 Python]

You won't see much difference at 21 feet (7 yards). You may not see much difference even at 45 feet (15 yards). You will notice the difference at 75 feet (25 yards).

 

[Bartholomew Roberts]

The M855A1 completely fragmented, retained nothing. The M855 retained 48.2% of its weight.

I don’t even have to read the article to know that’s horse poop. The larger steel penetrator on M855A1 is fragmenting completely?

https://usarmorment.com/pdf/M855A1.pdf

Not that this has anything to do with your gimmick handgun bullet.

 

[Don Dayacetah]

For defensive carry, I like the heaviest, slowest bullet I can find, for a given caliber.
One of the reasons 45ACP is effective and popular.