[driftdiver]

I’d wager a .45 FMJ performs better than a 9mm FMJ.

Likewise a .45 JHP is going to outperform a 9mm JHP.

[InABunkerUnderSF]

Yes but 17 round of 9mm JHP outperforms 13 rounds of .45 JHP.

[Brooklyn Attitude]

“I’d wager a .45 FMJ performs better than a 9mm FMJ.”

Depends on your definition of performance, but I would tend to agree.

“Likewise a .45 JHP is going to outperform a 9mm JHP.”
If you look at the penetration, expansion and wound channel data for modern bonded bullet designs there is little difference between the two. When you take into account that the 9mm platform offers greater capacity, lower recoil, smaller size and lighter weight, it is fairly obvious why many are switching to it. I don’t criticize people for carrying any of them. Paying your money and taking your choice is the American way.

[Trailerpark Badass]

Define “outperform.”

[archy]

I’d wager a .45 FMJ performs better than a 9mm FMJ.

Likewise a .45 JHP is going to outperform a 9mm JHP.

I have had .45 JHPs that failed to expand much past .50 caliber.

However, I have never had one shrink below .45.