5.56 in a Ruger Mini 14? - Page 3
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Old 05-13-2009, 02:59 AM   #21
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I just checked the mini-14 manual online. "The Mini-14 is designed to use either standard U.S. Military, or factory loaded sporting .223 (5.56) cartridges manufactured in accordance with U.S. industry practices." That takes care of it for me.

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Old 06-11-2009, 02:22 AM   #22
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On the Mini-14 (at least mine from the 580 series) behind the rear sight it says "Caliber .223 " From what was explained to me is if it said .223 Remington, then 5.56 NATO could not be fired, or not with out damage to the rifle or the person pulling the trigger. However since it says .223, both .223 Remington and 5.56 NATO can be fired.

Someone feel free to correct me if I have been misinformed.

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Old 06-11-2009, 02:37 AM   #23
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Quote:
Originally Posted by cameronguyton View Post
On the Mini-14 (at least mine from the 580 series) behind the rear sight it says "Caliber .223 " From what was explained to me is if it said .223 Remington, then 5.56 NATO could not be fired, or not with out damage to the rifle or the person pulling the trigger. However since it says .223, both .223 Remington and 5.56 NATO can be fired.

Someone feel free to correct me if I have been misinformed.
Well, The military cartridges have longer necks on them (5.56x45mm) and the civilian .223 cartridges have shorter necks. It's like a shotgun in 3" you can fire 2 3/4 and 3. With the AR you can fire 5.56 and .223 but check with a gunsmith before you start to put rounds through it.
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Old 02-06-2010, 06:05 AM   #24
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Default This discussion should already have ended.

Not only does the manual state it but I spoke with a tech from Ruger. You *CAN* safely fire 5.56 NATO rounds through a Mini14 as long as it isn't a target model. Look at Ruger's site for the different models and compare yours if you aren't sure, if you have the ranch rifle or "tactical" version you are completely safe to fire all of the 5.56 you can get your happy little hands on. At least for the new tapered barrel minis, I cannot speak for anything older. If it has a harmonic dampener on it, DO NOT use 5.56. Ruger has stated clearly that this can cause over pressurization and severe damage to the rifle and/or the person operating it.

The discussion about .223 and 5.56 differences are generally upsetting because the internet is flooded with them. They are indeed different, not the same, different. The 5.56 throat is indeed longer to allow for higher pressure.

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Old 07-01-2010, 10:06 PM   #25
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Default Manufacturer Confermation...

I know this is an older thresd, but just to help those wanting to know for sure...

After recieving TWO conformations from Ruger both on the phone and by email, information as follows...

" All mini 14's are chambered for 5.56mm and can shoot either 5.56 NATO or .223 REM. The only exception is the Target Model, which is chambered for .223 REM only and 5.56 is not recommended for this model."

Sturm Ruger did add however that you should stick with new US manufactured 5.56 and stay away from foreign or surplus.

Hope this info can help someone, it certainly helped me. Now that we know for sure, let's have at it!

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Old 07-01-2010, 10:55 PM   #26
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Quote:
Originally Posted by easterner123 View Post
Well, The military cartridges have longer necks on them (5.56x45mm) and the civilian .223 cartridges have shorter necks. It's like a shotgun in 3" you can fire 2 3/4 and 3. With the AR you can fire 5.56 and .223 but check with a gunsmith before you start to put rounds through it.
WRONG DEAD WRONG SORRY

OK LOOK there is no difference in the two.

For you who can not read that well. The biggest difference is the throat as the 556 uses a longer bullet and has a longer throat than the 223.

The cases are exactly (EXACTLY) the same no difference what so ever. Brass thickness varies from manufacture to manufacture. The thickest brass I have seen has been Laupa. Milspec brass can be thicker and thinner all at the same time for me all mil spec brass is junk. I am in it for accuracy and that means consistency mill brass will many times be thinner on one side over the other. Argue if you want I don't care the 5000 cases I have inspected 90% had thickness issues on the neck. lop sided necks kills accuracy.



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Old 07-03-2010, 05:38 AM   #27
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So many numbers my brain hurts

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Old 07-03-2010, 07:34 AM   #28
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This pic applies to Ruger Mini-14 Ranch Rifles serial No's. 580-00001 and above.
Sorry it's a bit blurry.

0703000030.jpg  
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Old 07-03-2010, 11:17 PM   #29
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Just another page from the manual.

0703001554.jpg  
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Old 07-04-2010, 12:32 AM   #30
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I have a Contender in .223 Rem and have fired mil 5.56. The 5.56 definitely has more pronounced muzzle blast than "normal" .223. I'm guessing it is the powder used but the 5.56 rounds seem more aggressive so I limit using them. Photos show a pretty large fireball with 5.56 but none with the .223.

Although not a rifle, a 14" barrel is pretty close to the length on most M4's.

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