[alfred10]

How far is a 5.56 effective? How much further is a military similar grade .308 round deadly out to?
I can carry four times as much 5.56 but is it as combat effective? How many rounds on average does a 5.56 take to drop someone? Is the 5.56 the 9mm of rifles and the .308 the .45 acp? I carry a .45 b.c I know if am in a fire fight one shot from my .45 will most likly end it. I would carry a .308 if this is the case.
My concern is stopping power which I believe does exist. There are people that are hit in good areas that dont drop. With all things equal will a .308 center mass be more effective than a 5.56 and will a .308 allow me to put shots center mass out to a much longer range; or will a 5.56 out shoot me by sheer ammount of low recoil high volume fire?
The two rifles are a Sig 5.56 and an M1A standard with military ammo. You could also throw in an M4 since they are a common weapon.
What is a .308 m1a standard with regular military ammo giving me that a 5.56 wont?
http://www.defensenews.com/story.php?i=4657696
I never liked the M4 for SHTF but the sig might make this round a good option.
This is what started my curiosity:
http://www.youtube.com/watch?v=4weIh3Mc6kU

 

[gjk5]

I carry a .45 b.c I know if am in a fire fight one shot from my .45 will most likly end it.

Oh my.

 

[crazymoose]

There's a much bigger difference between 5.56 and 7.62x51 than there is between 9mm and .45 (since there is almost no difference in terminal performance).

The 7.62 has almost twice the effective range, and is far better at barrier penetration.
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[.45Super-Man]

I'll take the 7.62x51 or 7.62x39 over the glorified varmint round any day! The 5.56 is not to the rifle, as the 9mm is to the handgun. The 5.56 would be more like the .32acp, in as much as it's much closer to the bottom in terms of power. Of course the 5.56 is capable of killing, as is a tire iron.....but that doesnt make it the right tool for the job. Look at a reloading manual with drawings and precise measurements/angles of different calibers and it's obvious that the .222 Remington is what we're talking about and it was designed from the ground up as a gopher round!

 

[Nestor]

Dear Alfred,
there is no difference at all except for the picture on the box of ammo.
All of the mentioned rounds go boom when You will load them in your shotgun.

 

[FobulousGlock]

I'll take the 7.62x51 or 7.62x39 over the glorified varmint round any day! The 5.56 is not to the rifle, as the 9mm is to the handgun. The 5.56 would be more like the .32acp, in as much as it's much closer to the bottom in terms of power. Of course the 5.56 is capable of killing, as is a tire iron.....but that doesnt make it the right tool for the job. Look at a reloading manual with drawings and precise measurements/angles of different calibers and it's obvious that the .222 Remington is what we're talking about and it was designed from the ground up as a gopher round!

 

[Zombie Steve]

 

[THE PUNISHER]

Dont get me wrong but the 5.56 was made to wound them and make there buddy pick them so you have 2 out of a fight and 1 round spent? why kill them with one shot of 308 and there buddy get pi$$ed and turn into the hulk or something and try to fight back...or do I read to much into the mall ninja talk...

 

[ilgunguygt]

Yep, this one is destined to be a classic.

 

[FLglockdude]

This will not end well.

 

[Shadyscott69]

It's Alfred! :wavey: :rofl:

 

[FLIPPER 348]

Is there anything better then an Al-10 thread??? !

 

[fnfalman]

10-gauge shotgun rounds versus 20-gauge shotgun rounds...is this the equivalence of .22 Magnum versus 5.7mm?

 

[Cheseldine]

Never seen this before...

Sig 556 better than the M4... funny

 

[Brucev]

If you lived in a world of 1000yd. shots... you'd need more than a 7.62mm round. If you live in the world of 500yd. shots... 7.62mm is fine. Most folks will never shoot anything over 300yds. other than targets. When a threat is at 300yds., a 5.56mm will do a very nice job indeed. For barriers... that's what they make machine guns for. Get a good AR-15/M-16 and some 30 rd. magazines. Load up and TKOB. JMHO.

 

[Andrewsky]

How far is a 5.56 effective? How much further is a military similar grade .308 round deadly out to?
I can carry four times as much 5.56 but is it as combat effective? How many rounds on average does a 5.56 take to drop someone? Is the 5.56 the 9mm of rifles and the .308 the .45 acp? I carry a .45 b.c I know if am in a fire fight one shot from my .45 will most likly end it. I would carry a .308 if this is the case.
My concern is stopping power which I believe does exist. There are people that are hit in good areas that dont drop. With all things equal will a .308 center mass be more effective than a 5.56 and will a .308 allow me to put shots center mass out to a much longer range; or will a 5.56 out shoot me by sheer ammount of low recoil high volume fire?
The two rifles are a Sig 5.56 and an M1A standard with military ammo. You could also throw in an M4 since they are a common weapon.
What is a .308 m1a standard with regular military ammo giving me that a 5.56 wont?
http://www.defensenews.com/story.php?i=4657696
I never liked the M4 for SHTF but the sig might make this round a good option.
This is what started my curiosity:
http://www.youtube.com/watch?v=4weIh3Mc6kU

I have never shot anything living with a 5.56mm rifle but I was pretty amazed by the performance of .308 soft points on deer.

There are people who will argue that 7.62x51mm is no more effective at stopping threats than 5.56x45mm.

I strongly disagree. Energy makes a big difference. Imagine shooting into water with a centerfire rifle. Does the bullet just make a clean path through the water. No, it does not. There is a huge splash. (http://www.youtube.com/watch?v=O0zGeAig0Pc) The splash is a function of the energy of the bullet, which is one half the mass of the bullet times the velocity of the bullet squared. E = (1/2)mvv or E = (1/2)mv^2.

Now what do you think happens when a bullet enters a human body full of soft tissue with a large composition of water? Well, I'm not a physicist but I imagine the disruption is a function of the energy.

Say you have a 147 grain bullet from an M14, and a 55 grain bullet from an M16. At some point, maybe three or five hundred yards downrange, the velocities of the bullet are going to become equal. The 55 gr may have started out with greater velocity but it will shed velocity more quickly than the larger bullet. So if the velocities are equal the M14's bullet will have over 2.5 times the energy of the M16's.

How does this translate to actually stopping a living organism? I do not know. The physics, biology, and psychology in each situation will vary.

A 5.56mm bullet will fragment more readily than other calibers. Does this compensate for having 2/5ths the energy of a 7.62x51? I doubt it. What about the difference in rate of fire? I find that I do not fire an AR-15 twice as quickly.

A 5.56 will have a flatter trajectory out to about 500 yards. After that it drops more quickly than a 7.62.

Also I don't see why you think you can carry 4 times as much 5.56. 7.62x51mm weighs twice as much as 5.56x45mm.

It's a free country. If my physical rationale doesn't make sense to you, buy a 5.56 rifle. I like mine. But I don't own a 7.62x51mm just because that's what they used in Rhodesia. I believe it is a more effective weapon.

 

[FobulousGlock]

If you lived in a world of 1000yd. shots... you'd need more than a 7.62mm round. If you live in the world of 500yd. shots... 7.62mm is fine. Most folks will never shoot anything over 300yds. other than targets. When a threat is at 300yds., a 5.56mm will do a very nice job indeed. For barriers... that's what they make machine guns for. Get a good AR-15/M-16 and some 30 rd. magazines. Load up and TKOB. JMHO.

^This. I bet OP was trolling anyways. This thread reeks of trollness.

 

[fasted]

As a Sniper with 28 months of downrange time with the BRO, I was tempted to address this question. I sat back and observed, and am glad I saved my breath. I still wonder why people continue to give replies...I'm new to GT, but really? Shouldn't this thread be stopped immediately? I'm almost as frustrated as when people ask me if I ever killed anyone or if it was really that hot....

 

[alfred10]

If you lived in a world of 1000yd. shots... you'd need more than a 7.62mm round. If you live in the world of 500yd. shots... 7.62mm is fine. Most folks will never shoot anything over 300yds. other than targets. When a threat is at 300yds., a 5.56mm will do a very nice job indeed. For barriers... that's what they make machine guns for. Get a good AR-15/M-16 and some 30 rd. magazines. Load up and TKOB. JMHO.

Suppose 100 or better yet 25 yards and under since most fire fights are at this distance. Will a 7.62 drop an attacker quicker than a 5.56 placed in the same spot? Would an equally skilled guy at any range with an M4, Sig 556, or M1A have an advantage and why?

I figured you guys have the info that I need. There are alot of misleading sources of information out there. I more or less want to have a rifle that will give me an advantage. I then want to impliment that rifle into regular training. But, I need to keep in mind that I am an individual or small unit at best. Therefore; what works for an infantry unit might not work for me...

I know the .308 in a match m1a with match ammo is a advantage but i was not sure if the extra weight will give me a disadvantage.

And no I never played online war games but would if I had a video game system (they look like fun ;-)) I dont want to come off as a "wanabe", but want info so I can pick between the Sig 556 and M1A. In my situation, what would give me an advantage?

Im not planning for zombieland 2013 but do want a go to rifle for whatever may or may not ever happen. And heck I just want to shoot something alot and have some fun.

 

[fasted]

I visited this Al dudes page....Seriously? Read his threads. "Will my G21 stop a black bear?" No, but if you place the barrel at the base of your neck it will stop these threads.