bullet weight vs speed and energy

[AKHunter]

Enough already! Pick a decent caliber for your chosen game and area, shoot it enough to figure the drop at given ranges, and shoot the animal in a vital area. I don't carry a calculator with me to the deer blind or or when I go hog hunting, I just know where and what I'm shooting.
__________________
Don't be messin' with my gun!

I'll high five that!

[.280Rem]

Originally Posted by runfiverun

i dont like theidea of the energy dump, a good through and through wound
chanell is what works, yes you can kill a deer with your truck.
you could also sneak up and hit him on the head with a ball bat.
but what kills it? energy transfer? or blunt force trauma.
i think trauma is the force at work here.
pretty much what sam said
i will stick with my 7x57 for deer and elk thanks.

What causes that trauma? Energy transfer! Blunt force trauma is the epitome of the results of energy transfer.

[Silent Shooter]

Shot placement! A small fast bullet that misses is useless. A BIG slow bullet that misses is useless. Any bullet that hits the right spot will result in an immediate kill on deer sized game, period.

[rfc357]

Originally Posted by toolman

Enough already! Pick a decent caliber for your chosen game and area, shoot it enough to figure the drop at given ranges, and shoot the animal in a vital area. I don't carry a calculator with me to the deer blind or or when I go hog hunting, I just know where and what I'm shooting.

Nobody is forcing you to read this stuff.

[ezearln]

Simple fact is there are a variety of factors in play in regards to terminal ballistics. Energy levels can be impressive and really enthrall those not really learned in the effects any projectile has upon living tissue and it's possible potential for producing a clean quick kill. Hydrostatic shock is not a minor consideration as can be demonstrated through ballistic gelatin testing as well as observation of kills in the field, nor is wound channel size, or energy transfer all contribute in one way or another to the effectiveness of any given projectile upon game.

[toolman]

Originally Posted by rfc357

Nobody is forcing you to read this stuff.

[Rattle'em up]

Originally Posted by GlockMeister

I'll stick to just grabbing a box of ammo, in whatever caliber I happen to be shooting off the shelf and be glad someone else has already done the math and simply enjoy shooting; Knowing I don't have to worry about any of that gobbledy gook. Just makes my head hurt.

Damn, I think your on to something there.

[.280Rem]

Originally Posted by ezearln

Simple fact is there are a variety of factors in play in regards to terminal ballistics. Energy levels can be impressive and really enthrall those not really learned in the effects any projectile has upon living tissue and it's possible potential for producing a clean quick kill. Hydrostatic shock is not a minor consideration as can be demonstrated through ballistic gelatin testing as well as observation of kills in the field, nor is wound channel size, or energy transfer all contribute in one way or another to the effectiveness of any given projectile upon game.

Yep!

[vikingpreacher]

To me if you can use a reasonably heavy for caliber bullet with solid construction that is what I would prefer. In many cases though the bullet weight isn't needed for example, 1 of the most popular weight/caliber bullets for deer hunting is a .308 with 150 grainers, reasonably light but will work just fine for deer and a solidly constructed 150 gr. .308 bullet with go clean through a deer.

[Brother Bob]

Originally Posted by vikingpreacher

To me if you can use a reasonably heavy for caliber bullet with solid construction that is what I would prefer. In many cases though the bullet weight isn't needed for example, 1 of the most popular weight/caliber bullets for deer hunting is a .308 with 150 grainers, reasonably light but will work just fine for deer and a solidly constructed 150 gr. .308 bullet with go clean through a deer.

Well sir, I don't know about that. It depends on the meplat of the bullet, barometric pressure, temperature, pollen and mold spore count just to mention a few.

[samuel]

Originally Posted by Brother Bob

Well sir, I don't know about that. It depends on the meplat of the bullet, barometric pressure, temperature, pollen and mold spore count just to mention a few.

Dont forget,whether it is headed in the right direction to start with. sam.

[billy]

Originally Posted by samuel

Dont forget,whether it is headed in the right direction to start with. sam.

yes but you must make sure conditions are right.
for instance..
When the moon is in the Seventh House
And Jupiter aligns with Mars

[samuel]

Will this work in daylight?I am not a real good shot in the dark. sam.

[Brother Bob]

Originally Posted by samuel

Will this work in daylight?I am not a real good shot in the dark. sam.

Any shot in the dark is lucky. I believe it was a lucky shot in the dark that brought us our youngest daughter! LOL!

[rdale501]

Originally Posted by billy

yes but you must make sure conditions are right.
for instance..
When the moon is in the Seventh House
And Jupiter aligns with Mars

Billy, you into witchcraft?

[billy]

Originally Posted by rdale501

Billy, you into witchcraft?

ok you caught me .
i stole that from the musical HAIR.
it's from that song
THE AGE OF AQUARIUS

[rdale501]

Yea Billy, I remember hair. Not wnating to age myself, but that was back when I actually had some. ???Were those the good old days???

[Phil Lozano]

Something to consider (when talking about bullet ballistics/performance) is Penetration Index (P.I.).

The easy way to calculate P.I.;

Example for a 416 ~

PI = 124.2 * (vel/2400)^2 * (wt./400)^2 / (dia./.416)^4

-- -- -- -- -- -- -- -- --

For the 450 N.E. and the 470 N.E. below.

For the 480 gr. bullet at 2150 fps, PI = 105.5

For the 470 NE, 2150 fps, 500 gr., PI= 92.2

Like most formulas, it likes velocity.

-- -- -- -- -- -- -- -- --

Reading through this topic, I noticed a few references to E=MC2.

And just to stir the pot further, I do not doubt Einstein theory, however, it is only a hypothesis.

And is only considered to be correct, as it has not been totally proven.

Best,
Phil
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Forgot to include comment for "Shock Power Index" (SPI).

Which is calculating the kinetic energy, by the cross sectional area of the bullet.

X SA =pie x R2

Basically, this is how hard of a blow the bullet gives when striking the animal.

Penetration of some large bores (over 50 cal.) seem to lack penetration, and at the same time have a large SPI.

Examples I have seen ~ If a brain shot is missed on an Elephant with a 375 H&H, the Ele will run off without much visual effect of the bullet strike.

However, the same shot with say a 600 N.E. (not nearly the highest on the penetration Index), you can visually see the effect of the bullet impact as it stuns and disorients the Elephant.

You may or may not be able to relate to this example, but think about it a bit. I think most would agree, there is a noticeable difference when shooting an Elk at 200 yards with a 338 Win. Mag than when using a 7mm Mag..

Granted, this formula, as with the kinetic energy formula being stacked in favor of velocity, is stacked in favor of bullet diameter (but velocity does play a very important role here as well, as it uses kinetic energy in pat of the formula.

Personally, I think this is quite an important equation when choosing a cartridge/caliber for a specific animal.

JMO

Best,
Phil
____________________________
Professional Hunter ~ Tanzania

Stay out of sight and down wind

Phil Lozano Tanzania Trophy Expeditions - Dangerous Game Specialists