1 Attachment(s)
Norma 9x19mm 108-grain MHP (299740020) in the Ruger MAX-9
While we had the test materials and set up available, we also ran the Norma 9x19mm 108-grain MHP (299740020) through the Ruger MAX-9 just to see how it would behave from a shorter-than-service-length (< 4'') barrel after passing through the IWBA standard barrier consisting of 4 layers of 16-ounce denim. Not surprisingly, there seems to be a lower velocity limit at which the Norma MHP will not expand.
Norma 9x19mm 108-grain MHP (299740020)
Date: 15th June 2021
Temperature: 75°F
Relative Humidity: 42%
Test Firearm: unmodified Ruger MAX-9, 9x19mm
Barrel Length: 3.20 inches
Barrier: 4 layers of 16-ounce cotton denim
Range: 21 feet
Test Medium: H₂O @ 68°F
Average Expanded Diameter: 0.355 ± 0.0005 inch
Recovered Weight: 108.4 grains
Recovered Length: 0.655 inch
Impact Velocity: 1,049 fps
Attachment 74317
Predictive Analysis:
Q-model
DoP: 23.437 inches
Wound Mass: 0.960 ounces
Wound Cavity Volume: 1.597 cubic inches
mTHOR model
DoP: 23.320 inches
Wound Mass: 0.955 ounces
Wound Cavity Volume: 1.589 cubic inches
Testing of the Norma 9x19mm 108-grain MHP from the 3.20-inch barrel of the Ruger MAX-9 was halted after it failed to fully expand in the water test medium after passing through 4 layers of 16-ounce cotton denim. The nose of the bullet was only slightly deformed with two of the four skived expansion cavity wall sections pushed inward about 1.5 millimeters at impact displacing the other two skived expansion cavity wall sections outward about 1.5 millimeters. Predicted penetration depth, permanent wound mass, and wound cavity volumes of the test projectile were modeled as for an FMJRN while assuming that it would maintain nose-forward stable flight through the test medium.