Test Gun: FN Baby Browning
Barrel length: 2.11 inches.
Ammunition: Hornady .25 ACP 35gr XTP.
Test media: 10% Clear Ballistics Gel.
Distance: 10 feet.
Chronograph: Caldwell Ballistic Precision Chronograph G2.
Five shot velocity average: 751fps
Gel Temperature 70 degrees.

In this test of the .25 ACP I tried out the Hornady 35gr XTP.

I got a five-shot average velocity of 751fps with a high of 791fps and a low of 714fps. I had one failure to feed when shooting the five-shot group and it set the bullet back. So I ended up with a 4 shot group.


Four shots at five yards offhand.

The first shot in the bare gel had a velocity of 805fps and penetrated to 10.5 inches. I actually got some expansion with this bullet at .31 inches. The recovered weight was 34.8 grains. The second round’s velocity was 729fps and it penetrated to 16.25 inches. There was no expansion and the recovered weight was 34.8 grains.



The two bullets in the heavy clothing gel had no expansion and both penetrated to 10 inches. The first bullet’s velocity was 765fps and the second was 725fps. Weight of the two bullets was 34.7 and 34.8 grains.



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Will you be testing this caliber with FMJ or cast loads?

These little mousegun calibers are just oodles of fun and I love them, but I'll feel bad if the .25 can't be made to reliably stay within FBI guidelines for penetration depth

FMJ tomorrow.

I can't imagine there's enough horsepower in the .25 ACP to both reliably expand & penetrate to 12".  .380 ACP barely does it, and .32 ACP is a FMJ caliber.

Yeah, I wouldn't expect the .25 to do both, but I'm hoping it can at least get 12+" of penetration reliably with the right ammo (as with the .32 and .380).

Thanks for this.  Always was curious.

My mom has a 25 and a 50rd box of Win PP 45gr.