2nd Gel Test - .32 Underwood Cavitator SP and +P

[alc95c]

FourGuysGuns performed a bare gel test of Underwood's .32 ACP 50 grain Cavitator in Standard Pressure and +P and posted it on Youtube yesterday (Sept 22, 2016).  The test also included Underwood's 85 grain Cavitator in .30 Carbine in an M1 Carbine, with very impressive results, but that won't be discussed in this post.
https://www.youtube.com/watch?v=9eGKBTDcKbc

Test Protocol
- Bare 10% Gelatin provided by Doctor Kote
- Beretta Tomcat: 2.4" barrel
- CZ VZ61 SKorpion "clone": assumed barrel 4.5", which is the original length
- Velocity was not measured.
- Wound channel was not measured, but was impressive and shown in good detail.

Penetration Results
Penetration results weren't explicitly stated.  The following results are based on my measurements at 1/4 speed and include full depth travel of the bullet prior to any snapback in the gel.

                   Underwood .32 ACP 50 gr Cavitator Penetration
                                Standard Pressure            +P
Beretta Tomcat                     14"                      14.7"
CZ VZ61                                16"                      19"
Underwood Spec                   14"                      14.75"
(from (2.7" P32)

Reliability
Was not discussed

Comments
These bare gel penetration results are very close to Underwood's specs and also that independently obtained by Jeremy S. in last month's Youtube video, which was discussed in this thread http://naaminis.com/smf/index.php?topic=8870.0

The gel depth penetration of the Underwood Cavitator ammo from the Beretta Tomcat is comparable to FMJ's and 4" - 8" deeper than fully expanded JHP's from 2.4" - 2.7" pistols.  Width of wound track is larger than fully expanded JHP's and much, much larger than FMJ's.

It is a very significant improvement in .32 ACP self defense ammo.  Very encouraging.

[mikiec32]

  Thanks for the report.  A very unusual bullet  shaped like a square drive ,(robertson), screw driver bit.