10 velocity tests on each type of round was conducted using
an Oehler Research 35P chronograph 15 feet from the muzzle. Results are
included below:
2738
2725
2735
2730
2757
2712
2719
2741
2729
2744
Mean: 2733 fps.
After some alignment shots, targets (bare gel blocks)
were placed 16 feet from the muzzle and each subjected to a single round.
Velocity of the projectile was again measured at 15 feet, 1 foot before
the gelatin block.
Multiple blocks were shot.
The blocks were examined, photographed and then dissected
into slices. Slices were photographed to measure and record wound profile
size. Fragments were then extracted and their penetration depth measured
and recorded. Fragments were organized according to penetration depth
and photographed to record fragment distribution throughout the wound
cavity.
The ammunition was consistent in gel with all shots exhibiting
similar ballistic performance- only a .5" variation in penetration between
all shots was observed.
Results notes/Observations:
Velocity of the displayed gel shot was 2734 fps.
Fragmentation of the rounds was dramatic and among the
3 best rounds tested by the authors.
Total penetration averaged 12.5"
Despite the excellent fragmentation, substantial bullet
mass typically was retained in one or two larger lead/copper fragments,
which typically established the farthest penetration frontiers in the
gel. The authors believe this behavior represents a positive sign for
this round's tissue performance after barrier interaction.
Neck length was generally around 1.6".
The largest recovered fragments typically appear to be
the bullet's base and rear jacket structures.
Wound cavity size at its extreme was typically 3.875"
at inch 4-5 and numerous fragments were deposited at the extreme edges
of these fractures, indicating high tissue disruption potential even at
the frontiers of the round's tissue disruption.
Comparison to SAAMI pressure 77 grain nosler (no cannelure):
Recovered Weight:
SAAMI 77gr: 74.2gr
NATO 77 gr: 73.7 gr.
Fragmentation:
SAAMI 77gr: 74.2gr.
NATO 77 gr: 73.7 gr.
Largest Recovered Fragment:
SAAMI 77gr: 32.1gr.
NATO 77 gr: 34.2 gr.
Neck:
SAAMI 77gr: 1.57"
NATO 77gr: 1.60"
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