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-   -   How many foot pounds of energy can 55.6\223 shoot? (http://www.firearmstalk.com/forums/f20/how-many-foot-pounds-energy-can-55-6-223-shoot-71871/)

Abc1911 09-05-2012 07:44 PM

How many foot pounds of energy can 55.6\223 shoot?
 
How far will the bullet lose its energy? Can you kill a deer at 500 yards?

mountainman13 09-05-2012 07:56 PM

Depends on the round weight and grain load.

SSGN_Doc 09-05-2012 08:54 PM

It's not all about foot pounds of energy. Bullet placement. Bullet weight. Bullet construction. Are all factors to consider.

Then consider the size of deer in your area.

There are ballistics tables on the web that tell you what the performance of a given bullet should be as far as speed, energy, and drop based on the bullets speed at the muzzle. The tables wont show how the bullet will perform once it hits a 110 lb swamp deer at 75 yds vs. what it will do hitting a western mule deer that weighs nearly 200 lbs on the other side of a clearcut at 250 yds.

Too many variables in the field and too vague a question to give a definitive answer to.

But to answer as worded I will say that it loses some energy as soon as it leaves the muzzle and continues to do so until it comes to rest. Yes you COULD kill a deer with it at 500 yds.

May not be the most efficient choice though.

kryptar19 09-05-2012 11:45 PM

62gr Hornady Vmax bullet
27.5gr of B-Lc(2) powder

^^This is my personal load that can kill them pretty well out to 300 with.
Ill get you a web sight that you can run load data thru later.

But like SSGN_Doc said, consider the size of your deer. I live in Arkansas and the deer here do not get over 220lbs often. They usually fall between 100-170.

Coyotenator 09-06-2012 12:32 AM

Can't use .223 in Washington for deer.

Formula for ft.lbs. is velocity in fps squared X bullet wt in grns / 450,240
3200X3200=10,240,00 X 55grns=563,200,000/450,240=1251 ft.lbs at muzzle

mountainman13 09-06-2012 12:34 AM

Quote:

Originally Posted by Coyotenator
Can't use .223 in Washington for deer.

Formula for ft.lbs. is velocity in fps squared X bullet wt in grns / 450,240
3200X3200=10,240,00 X 55grns=563,200,000/450,240=1251 ft.lbs at muzzle

Very good.
Know how to calculate tko factor?

canebrake 09-06-2012 12:41 AM

It's 5.56...................

55.6 is 2 13⁄64in

mountainman13 09-06-2012 12:42 AM

Quote:

Originally Posted by canebrake
It's 5.56...................

55.6 is 2 13⁄64in

Now that would be fun! Lol
Nice catch cane. I didn't even notice.

Coyotenator 09-06-2012 12:44 AM

Bullet wt in grns X bullet diameter in inches X velocity in fps/7000
55X.224=12.32 X 3200=39424/7000=TKO of 5.632

mountainman13 09-06-2012 12:46 AM

I find it interesting to compare the two together and then compare to other calibers. Idk,I'm a dork. Lol


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