9mm Federal HST 124gr Clear Ballistics Gel Test Comparing Barrel Lengths From 3” to 16”
This video tests the performance of 9mm Federal HST 124gr Plus P ammunition across various barrel lengths, from 3 inches to 16 inches. It measures velocity, penetration, and expansion in Clear Ballistics gel, revealing how barrel length impacts terminal ballistics. The findings suggest that beyond approximately 7-9 inches, significant velocity gains diminish, and pushing the round too fast can lead to over-expansion and reduced penetration.











