| Will |
| (.333 member) |
| 23/12/04 09:53 AM |
|
Re: 380 grain in .375, penetration vs. .458 / 500 gr.
|
Calculate the Penetration Index and find out!
PI = (KE)(SD)/(100 Af)
where KE is bullet knitic energy, in ft-lb, (MV^2/7000(2G))
G=32.17
V= bullet velocity in fps,
M= bullet mass in grains
SD = sectional density
Af = bullet cross-sectional area
The 380 gr. even at 2250 probably has a greater PI than the 500gr. 458, which isn't too whippy in the first place.