Bang-sticks wrote:I mainly shoot pigs out of a 30-06 using 150gr hornady interlocks. But heading to the nt and may get a shot at a buff. I have been told 180gr projectiles are better & penetrate deeper. Was curious as to why as the 150gr are carrying more energy out to. 200m.
duncan61 wrote:180 gn Corelokt will do the job
Supaduke wrote:Momentum.
Heavier bullets require more resistance to stop.
Heavier bullets soak up more energy from the powder to begin movement. Hence heavier bullets travel slower with similar powder loads.
Heavier bullets have greater trajectory and require more holdover.
Heavier bullets are less affected by atmospheric conditions.
If bullets are like for like the heavier bullet will penetrate further.
Lighter bullets fly flatter
Lighter bullets are often more frangible and can come apart more on impact.
Lighter bullets fly faster so what they lack in mass can be countered with speed and kinetic energy.
The easiest way I can describe it.
You can throw a pebble quite fast and quite far, hit something and it will hurt but probably not fatal.
Lob a brick, probably only able to throw it a few meters but if you hit someone with it.....
Supaduke wrote:Momentum.
Heavier bullets require more resistance to stop.
Heavier bullets soak up more energy from the powder to begin movement. Hence heavier bullets travel slower with similar powder loads.
Heavier bullets have greater trajectory and require more holdover.
Heavier bullets are less affected by atmospheric conditions.
If bullets are like for like the heavier bullet will penetrate further.
Lighter bullets fly flatter
Lighter bullets are often more frangible and can come apart more on impact.
Lighter bullets fly faster so what they lack in mass can be countered with speed and kinetic energy.
The easiest way I can describe it.
You can throw a pebble quite fast and quite far, hit something and it will hurt but probably not fatal.
Lob a brick, probably only able to throw it a few meters but if you hit someone with it.....
Supaduke wrote:Yes, if motivated with more energy a heavier projectile can fly flatter. BC also comes into play. It's a complex thing for sure. It's like the torque vs horsepower arguement. Similar results achieved by different methods.
bladeracer wrote:Supaduke wrote:Yes, if motivated with more energy a heavier projectile can fly flatter. BC also comes into play. It's a complex thing for sure. It's like the torque vs horsepower arguement. Similar results achieved by different methods.
Higher BC allows a heavier bullet to shoot flatter and retain more energy at the same velocity - you don't need to push it any harder, you can in fact run it slower and have the same terminal ballistics.
For example, the 180gn Interlok BTSP versus the 180gn Interlok Round Nose versus the 150gn Interlok BTSP- both 180gn bullets at 2600fps and the 150gn at 2900fps. Then below that I've shown the 150gn BTSP but at 2600fps. Even at the same 2600fps velocities, the little 150gn bullet retains more energy than the 180gn RN out past 200 yards.
180gn BTSP - BC .452 at 2600fps:
50yds - 2504 ftlb
100yds - 2318 ftlb
200yds - 1978 ftlb
300yds - 1678 ftlb
400yds - 1415 ftlb
180gn RN - BC .241 at 2600fps:
50yds - 2340 ftlb
100yds - 2017 ftlb
200yds - 1477 ftlb
300yds - 1062 ftlb
400yds - 759 ftlb
150gn BTSP - .349 at 2900fps:
50yds - 2548 ftlb
100yds - 2315 ftlb
200yds - 1899 ftlb
300yds - 1543 ftlb
400yds - 1242 ftlb
150gn BTSP - .349 at 2600fps:
50yds - 2039 ftlb
100yds - 1844 ftlb
200yds - 1496 ftlb
300yds - 1203 ftlb
400yds - 959 ftlb
Supaduke wrote:That's what the wife said.....