Small Rifle help

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   / Small Rifle help #201  
Alan, that is correct. Here is another way of thinking about it. Fire a gun paralell to the ground. At the moment the bullet clears the muzzle, drop another bullet from the same height as the muzzle and they both hit at the same time just in different places. On goes straight down, the other goes outward from the gun but down at the same rate. This is hard to grasp because we think of bullets travelling a long way for a (relatively) long time. But that is because we generally aim them 'up' to get them to go farther and they make an arc when we do that.

When it comes to dropping a bullet, a bowling ball or an arrow from the same height, yes, they will all hit the ground at the same time. Gravity acts the same way on anything. In the real world, weight is not the issue. But, if anything has any significant aerodynamic drag, things will appear different. Drop a sheet of paper and a similar sized sheet of paper wadded in a ball and what happens? The wadded ball hits the ground much sooner. We can all recognize that it is the aerodynamics that create this affect. For the law of gravity to be flawless in practical application they have to be done in a vacuum where air resistance plays no role. In a vaccum the paper ball, the sheet of paper, a bullet, a bus, or a feather will all fall at the same rate.
 
   / Small Rifle help #202  
AlanB said:
So what you guys are saying is that if I fire a flat shot (no rise) it will only be flying for 2 seconds max because gravity will pull it down?
Yes, that is what we are saying.

BillyP said:
Have we figured in wind resistance yet
No. But with the exception of some things with very high surface areas versus weight (for example a single feather or a flat piece of paper) there is no practical difference between the wind resistance issues involved when measuring the drop time of any dense object (our examples of the bullet, the arrow and the bowling ball).

There is a terminal velocity at which a body can fall. I forget what it is, but there is a point at which a dense object (like a guy jumping off a roof) will no longer accelerate and will hit a maximum speed and not go any faster, that terminal velocity is based, to some degree on wind resistance.

But I suspect that when you think of wind resistane on a bullet you are thinking of the resistance to it forward travel (for example a pointy bullet versus a flat bullet) and the forward travel speed is independant of the vertical drop speed. Both a pointy bullet and a flat bullet drop at the same speed. A pointy bullet speeding along at 4000 fps (like a 204 Ruger) will drop at the same speed as a 880 fps (like a 230gr 45cal semi wadcutter).
 
   / Small Rifle help #203  
EddieWalker said:
OK cp, maybe your serious, but I feel like I'm being set up here.

You wrote;

"Example:
.223 Remington, 55gr @ 3100fps = 1172 ft-lb energy
.45 Long Colt, 255gr @ 860fps = 418 ft-lb energy

.223 is virtually guaranteed to stay inside an elk whereas the .45 LC has a very good chance of going clear through."

To just go over the basics with you, speed is measured in feet per second, or fps. As a general rule of thumb, the faster the bullet travels, the flater it shoots and the more accurate it is. Basically the faster the bullet travels, the sooner it gets to it's target and the less time it's being pulled down by gravity.

Next we look at bullet size. A small bullet holds very little energy in it with less impact on objects it comes into contact with. The faster you move the bullet, the more energy it will have. Your example of the .223 witha 55 grain bullet only has 1,172 pounds of energy.

Energy is determined by speed of the bullet and the bullet weight. You can tweek this with bullet design and powder burn speeds, but we'll stick with the basics. Energy is the amount of power the bullet hits the target with.

This isn't very much energy. In fact, it's only going to be effective for hundred pound animals or less. Very few hunters will consider this a big game hunting cartridge. It will kill a deer under ideal conditions, at close range with a very good shot, but that is very unlikely in the real world.

The other example in your comparison is the .45 only has 418 pounds of energy. This will still hurt a human sized target, but it would be a very, very poor choice for hunting. Plust this is a pistol cartridge.

Comparing a low speed pistol caliber to a high speed rifle round is just silly. There is no other term to describe it. But to prove that you are trying to make some sort of joke, you chose an elk as your example. An animal that weighs 800 pounds or more, and is the second strongest, toughest animals in North America. The only animal bigger and stronger are the big bears. A moose will weigh more, but doesn't even compare in strength.

Neither caliber in your comparison has much of a chance of killing an elk at one hundred yards. In fact, the pistol will barely break the skin. The only shot that has any chance of killing an elk with a 45 is going to be through the eye socket at such an angle to take out the brain. Even then, I'd have my doubts. The 223 might make it to the heart, or puncture a lung, but the damage will be so minimal that he'll travel miles before dying.

These are realistic expectations of what those calibers are gonna do. Neither has a chance of going through an elk, but he 45 will be lucky to make it to the elk even is he's at the close range of 100 yards.

Your only argument for killing an elk with a 45 is if it's tied up and in a cage. Then you can kill an elk with a .45, but the bullet still wont have enough power to travel through the animals.

If you have an interest in learning about weapons, or ballistics, just do a google search on the term, "rifle ballistics" or " bullet ballsitics" and you will find all the numbers. Then we can debate which is the best elk caliber until we die and never come up with an answer. There are some calibers that are better suited to elk hunting over other calibers, but that just limits the debate to about a dozen or so calibers.

As an example, here are your ballistics and I've added my two hunting rifles.

.223 Remington, 55gr @ 3100fps = 1172 ft-lb energy
.45 Long Colt, 255gr @ 860fps = 418 ft-lb energy
.30-06 Springfield, 165 gr @ 2800 fps = 2872 ft-lb energy
.338 Winchester Magnum, 250 gr @ 2660 fps = 3927 ft-lb energy

I use the .30-06 for hogs, deer, caribou, pronghorn, sheep and animals in the 100 to 400 pound range. Notice that it has 2.45 times the energy of the .223 and 6.87 times the energy of the 45. This is a caliber that will kill an elk, but not one I'd recomend. It also isn't powerful enough to put a bullet through an elk. At one hundred yards, it will kill, but at 300 yards, the energy drop is too significant to be effective or reliable. When hunting elk, cross canyon shots are very common.

The .338 mag is my elk caliber. It is 9.39 times more powerful than the 45, it's 3.35 more powerful than the .223 and 37 percent more poweful than my .30-06. This caliber will put a bullet through an elk. It is a belted magnum that is very, very powerful. My furthest elk kill with this caliber was right around 500 yards. It was a very, very far shot, but I was able to lie down with a very solid rest for the shot. I've killed four bull elk that had 5 points or better with this caliber. Twice the bullets passed all the way through.

When you say a bullet with 418 pounds of energy has more power than one with 1172 pounds, you are either being silly, making a joke, or don't have a clue.

When you say the slower, less powerful bullet has a better chance of penetrating an elk over a more powerful round, you just confirm my earlier statement.

The fact that you didn't even know that neither a slow pistol round, nor a fast, small caliber round can not pass through an elk tells me you might actually fall into the last catagory, and are offering opinions based on zero knowledge of what you are talking about.

Eddie
Yeah, you were set up. I gave you a chance to do some research. But it is obvious that you didn't and by the time you were finished typing, you had convinced yourself (again) what an ignoramus I am. I could parse your post and rip each paragraph to shreds, but I will refer you, instead, to the following references which will do it for me:

"Textbook of Pistols and Revolvers" by Maj. Julian Hatcher. In particular, chapter 12.

"African Rifles & Cartridges" by John Taylor.

"Big Game Hunting" by Elmer Keith.

"Sixguns" by Elmer Keith. Chapter 6 (Game Shooting), Chapter 16(A Bullet Chapter),Chapter 18(Cartridge Selection; I direct your attention specifically to page 284, first and second paragraphs)

All of these men, and more (Cooper, Jordan, Skelton), have thoroughly rejected the notion that kinetic energy is, by itself, a measure of cartridge effectiveness on game. I guess, since I'm in their camp, we're all wrong.

Nowhere did I make a recommendation that either cartridge would make a good choice for elk. I only chose an elk because as poor as either cartridge would be for elk, one is vastly superior to the other.

In closing, Eddie, where did I say the .45 Colt had to be fired from a pistol? Are there no carbines in that caliber? But, even giving you that restriction, your comment that "the (.45 Colt) pistol will barely break the skin" at 100 yards demonstrates conclusively the width and depth of your knowledge.
 
   / Small Rifle help #204  
I don't know about all that now,,,,probably true,,but,,,,I guess if I took that bullit you dropped and threw it at the ground to make it hit the ground quicker,that would screw up einstin and newtons work? This is interesting,,,wonder if its ever been tested,,,sounds like something for the myth busters,[or was it already on there?] Just seems to me,,on perfectly flat ground like in the great salt flats,a high power rifle bullit,shot from two foot off ground would stay in air longer than a second,,,but,,,maybe not,,,,,
Wonder if you dropped a beaver? his tail would probably catch air,,but if you shot him out of a cannon,his tail would be like a rudder? thingy
 
   / Small Rifle help #205  
I think that was Newtons law of Gravity. I've been out of school 40 years but I sort of remember that name. Dropped two different weight and different sized objects off the Leanining Tower Of Pisa or something to that effect..
 
   / Small Rifle help #206  
ARE WE LOOKING FOR 32 FEET PER SECOND PER SECOND ?
 
   / Small Rifle help #207  
SkyPup said:
And allot of similarities.

When both are fired at the same time parallel to the ground, they both hit the ground at the same time....


I knew that simple universal fact would cause allot of wondering......

A 70 pound beaver and a 30 pound beaver both dropped at the same time from the same height will also hit the ground at the same time as a bullet fired parallel to the ground at the same height..... :D
 
   / Small Rifle help #208  
Just to take one more swing at this poor expired equine ;)

Since we are not operating in a vacuum, aren't the wings of the arrow going to create aerodynamics that will make its flight last longer than the bullet and the bowling ball?
 
   / Small Rifle help #209  
CP1969, I'm in Eddie's camp (well, sort of) here in regard to kinetic energy. That is qualified by what I said in regard to low velocity projectiles and I'm not hard headed enough to think that there are no other factors beside kinetic energy. But from my perspective, kinetic energy is THE primary factor in tissue damage. Again, as I said before, how that kinetic energy is applied is very important and bullet size, density and deforming properties all affect that.This makes bullet selection for the proper game type extremely important. A soft, super high velocity bullet could literally splatter on a rhino's skin. By the same token, a huge low velocity bullet might just give him a nasty bruise. But, to do damage, energy must be applied. For it to be applied it has to be aquired. Mass and velocity affect the aquired energy of an object in motion but the velocity is squared and the mass is multiplied by the velocity. So velocity is the primary source of kinetic energy.

I'm a lifelong big game (deer, small by big game standards) and I'm a virtual nit wit when it comes to physics. However, I did my surgery research paper on low velocity bullet wounds (in contrast to high velocity bullet wounds) and I can tell you that from the persepctive of people who have to fix the wounds caused by bullets, kinetic energy is the defining factor in regard to tissue damage.

I don't think we really disagree all that much, but energy is energy is energy. But, if you have good points to make, please share them. Don't just tell us to trust you or read a book, if I'm wrong I want to know.....and so does my wife, she love's it when I'm wrong...which is probably why we have such a good marriage.
 
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   / Small Rifle help #210  
jeffinsgf said:
Just to take one more swing at this poor expired equine ;)

Since we are not operating in a vacuum, aren't the wings of the arrow going to create aerodynamics that will make its flight last longer than the bullet and the bowling ball?
No, but they will keep the arrow flying in a nice arc as it decends to the ground. The "wings" on an arrow are not providing "lift" the way an aircraft wing provides lift. They are there for directional stability. It still is going to fall just like a rock, a beaver, a bowling ball or a bullet and it will still impact the ground at the same time as the other objects (presuming they were fired or dropped from the same height, parallel to the ground, etc)
 
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