Quote:
Originally Posted by 358156hp
Your hypothesis is flawed, and your conclusions are inaccurate.
But the 9mm bullet would need to expand to .452 before it reaches the target to have the same initial frontal impact area as 45 ball, and somehow its profile. Bullets don't necessarily expand to full diameter the instant they strike a soft target. From that point of view, it would also need to gain 65 grains in weight somehow to equal the 45s penetration in said soft target.
As for the 40 S&W, its tombstone will read something like "Here lies the 40 S&W, designed to equal the performance of the 45 ACP, and the convenience of the 9mm. It failed in both regards by only offering the major drawbacks of both cartridges with none of the benefits of either".
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What you say is true, but the first few inches of penetration don't do serious (fatal) damage whether it's a big or small bullet. These bullets I'm using are very soft. The extra hard bullets I started with showed some (a little) expansion, one got to .45 size. I expect that these will expand like crazy. Maybe flatten into a coin shape.
