remingtonman_25_06
Handloader
- Nov 17, 2005
- 2,786
- 341
I am using the 120g NBT with 64g H4831 for a velocity of 3200fps.
I wanted to see how well the 120g NBT would hold up at an impact of 3000fps so I lined up 8 milk jugs filled with water at 100 yards.
The first shot blasted through 3 of the jugs before stopping in the 4th. The lead core did seperate from the jacket but was found in the jug as well, it weighed 58g. Expansion was probly 2x original diameter.
The second shot again blasted through 3 jugs before stopping in the 4th. Again, lead core did seperate and fall out, this one weighed 62g, again expansion was 2x original diameter.
So, what I'm lookign at is 50% weight retention, and 4 jugs of penetration at 100 yards with an impact velocity of 3000fps. Pretty typical on the weight retention and expansion part of the NBTs in my experience.
I"ll get some pics up a little later.
I wanted to see how well the 120g NBT would hold up at an impact of 3000fps so I lined up 8 milk jugs filled with water at 100 yards.
The first shot blasted through 3 of the jugs before stopping in the 4th. The lead core did seperate from the jacket but was found in the jug as well, it weighed 58g. Expansion was probly 2x original diameter.
The second shot again blasted through 3 jugs before stopping in the 4th. Again, lead core did seperate and fall out, this one weighed 62g, again expansion was 2x original diameter.
So, what I'm lookign at is 50% weight retention, and 4 jugs of penetration at 100 yards with an impact velocity of 3000fps. Pretty typical on the weight retention and expansion part of the NBTs in my experience.
I"ll get some pics up a little later.