Posted on 12/26/2016 6:32:02 AM PST by US Navy Vet
The part that makes up the leade dimension is longer. Look at th SAAMI drawings of a he cases.
Oh, that was good.
".... so that working the brass when sizing the case won’t cause cracking." No. Strain hardening does not cause immediate stress corrosion cracking (season cracking) all by itself. Long term exposure to corrosive atmospheres causes the differential cracking along the material grain boundaries
"That’s what creates a discoloration of the cases." No. Strain hardening does not cause the discoloration. The blue/gray discoloration is simple oxidation of the copper alloy shell case induced by the approximate 1000 degree F temperatures of the annealing flame or induction heating.
Geez. Did he really have to give the /s? He was joshin’ ya!
So you are giving out recommendations not advice. Funny you are. We are to take you recommendation to ignore everyone else’s advice. Ok, I guess we wil heed your recommendation since that is different than advice.
So you are giving out recommendations not advice. Funny you are. We are to take you recommendation to ignore everyone else’s advice. Ok, I guess we wil heed your recommendation since that is different than advice.
"....but there is a difference in the overall length." Length of what? Shell case? Chamber? Cartridge Over All Length? I would ask that you be specific, but that would probably just result in more misinformation from you.
> "Take a look at the SAAMI diagrams." I am looking at both the .223 SAAMI Cartridge and Chamber drawing and Army Drawing No. 9378276 for 5.56mm Case in front of me as I write. The SAAMI Case Length is 1.760-0.020". The Army Case Length is 1.76-0.01". They are nominally identical although the Army has tighter tolerances.
You will not prevail when trying to B.S. an ammunition expert. "Likewise this will affect headspace." Wrong once again! The headspaces are identical and nothing discussed on this thread about interchangeability relates to headspace.
Please quite posting misinformation on this forum.
And, when you find yourself in a hole, it is best to stop digging.
The barrel marking isn’t necessarily controlling because some manufacturers (Colt and Bushy, for two) only use barrels chambered in 5.56 NATO even though some of them are stamped .223 Rem. Probably a liability thang since there’s no added risk in firing .223 Rem in a 5.56 NATO chamber, but the opposite isn’t necessarily true. Check the mfgr’s full specs to confirm.
Leade/foyer Barrel/home
They make a gauge to check your barrel’s leade. If you have a .223 leade there is a reaming tool to make it 5.56.
The leade is the non-rifled portion of the chamber where the bullet makes the “jump” into the rifled lands and grooves of the barrel.
The 5.56 has a slightly longer case neck than the .223. Think of the leade as the foyer to your home/barrel. If the cartridge is a 5.56 and its bullet is jammed into the barrel, that isn’t groovy. Too much gas pressure. 5.56 barrels can take more pressure than .223.
Like us freepers, the bullet needs a short period of time to think about making that trip down your barrel and it does that just after ignition in the leade. Shoot enough 5.56 in your .223 and you may start blowing primers.
Just my two cents. Don’t hurt me.
Another question
Can 22 LR be used in a 22 magnum gun?
Good post RC.
223 and 556
Here it is!
the important difference is the lethality difference- the .223 is only capable of killing small game animals and such while the 5.56mm cartridge is fully capable of downing passenger jets owing to the fact that it is commonly fired from an AR15. If the 5.56 round is fired from a wood stocked mini-14, its letahlity is reduced to that of the .223 round however.
I see what you did there.
What if the mini-14 has a black synthetic stock? Will the 5.56 round regain its genocidal killing power?
And still not a single pic of ammo or anything that fires the calibers in question. Smh. Slipping.
Only if the shoulder thing goes up.
i was not speaking to you. Think about what happens for a moment, when you pull the trigger, you cause an explosion inches from your face. What i am advising is an educauion plan. My own education on firearms started at the age of five. My teacher was a very compitent father, who assembled firearms from parts. My father taught me to rely on my knowledge. Not to depend on others.
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