This is the second time I've heard this... One of the AR magazines, can't remember which one, but it was all about the blackout/ whisper cartridges ..Kyle Lamb wrote an article about this same thing happening in a class... The rifle was blown apart.
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Member
This is the second time I've heard this... One of the AR magazines, can't remember which one, but it was all about the blackout/ whisper cartridges ..Kyle Lamb wrote an article about this same thing happening in a class... The rifle was blown apart.
Member
You definitely want to do what ever it takes to prevent putting the wrong ammo in the gun. For me, I have my 300 BLK upper marked, along with dedicated/marked 300 BLK magazines.
"Every step we take towards making the State our Caretaker of our lives, by that much we move toward making the State our Master." Dwight D. Eisenhower
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One would have to be extraordinarily stupid to think loading a 300 AAC cartridge in a 556 and pulling the trigger is an OK thing to do. I am very doubtful this a case of extraordinarily stupidity, it is almost certainly a case of carelessness or inattention. Poor taste in ARs does not indicate stupidity, merely poor taste. If you think something like this can't happen to you then something like this probably will happen to you.Originally Posted by ThePraetorian
Good idea. I'm going to do exactly that right now.
Last edited by Suwannee Tim; 06-15-13 at 10:12.
Senior Member
I just tried this. Made two dummy rounds of Sierra 200 grain spitzer boat tail bullets loaded without powder or primer into Remington brass, full length sized. Both chambered with two punches on the FA and not particularly hard punches. It was easier than I thought it would be.
Last edited by Suwannee Tim; 06-15-13 at 10:14.
Senior Member
I admit to being unpleasantly surprised at this finding. I thought it would take extraordinary effort to chamber a 300 in a 5.56 but this proves me wrong.
Tim, can you take photos of how the dummy rounds looked like after being shoved into the 5.56 chamber and post them?
Last edited by MistWolf; 06-15-13 at 10:19.
The number of folks on my Full Of Shit list grows everyday
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you guys are overlooking the obvious.
if this was impossible,
Silvers would be stomping his feet and raising hell.
His absence here is actually very telling...
Senior Member
Left to right:
Federal 556, Remington 115 gr 300 AAC, handloaded 300, two dummy 300, Sierra 200 grain bullet.
The Remington factory 115 would not chamber due to the powder charge preventing the bullet from being pushed in deeper. The bullet was pushed in though could not be pushed in deep enough for the bolt to close.. The dummies chambered with ease, even though they have no powder, the charge is a mere 10.0 grains of 296 and I think there is plenty of room in the case.
Now the question is how about a handload with powder?
I made two more dummies and left the spent primers in but powder charged them with the 10 grains of 296. Went right in the 556 chamber, one didn't even need a push on the FA.
This is a real hazard.
Last edited by Suwannee Tim; 06-15-13 at 11:28.
Senior Member
I'm damn glad I didn't figure this out the hard way. I am going to seriously sequester my 300 AAC handloads. Same way I seriously sequestered my 458 X 1-1/2" loads when I had one. BTW 458 X 1-1/2 will wreck a 264, 7mm, 300 or 338 magnum. Same as this.
Member
MistWolf
It just proves stupid hurts and is usually very exspensive! Since most factory 300 Blk rounds are neither canlure bullet nor are they crimped just loading them an let the bolt slam shut will allow 300 Blk (115gr,125gr loads especially) chamber an be fired! The first unlucky individual did this stunt got exactly the same result! Just proves that these are not toys folks so KNOW WHAT THE FREAK YOUR LOADING IN YOUR GUNS!A little common sense goes along way- When I shoot my 300 the 5.56mm stays home! When I'm with others who are shooting 5.56mm I tell them to leave my 300 ammo alone!
Last edited by GunnutAF; 06-15-13 at 15:57.
Senior Member
I would absolutely not call this stupid. Like every other member of this forum I'm sure I am not stupid yet I can see myself doing something like this. Not knowing that it is possible, not paying attention, distracted, in a hurry. The fact is, humans like all living organisms are hard wired to conserve energy and effort. This survival mechanism sometimes works against us when we fail to pay adequate attention to a very familiar situation. It is wise to understand your limitations and the temptation to devote not enough attention to a simple task is a limitation we all share.
Last edited by Suwannee Tim; 06-15-13 at 20:41.
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