I remember this debate somewhat. I think the warning was meant for those using older mil-surp rechambered rifles from the turn of the century. I'm vague on the whole debate.

There is a velocity/pressure difference between .223 and 5.56, it is quite common for ARs with .223 chambers to shed crimped in primers while firing 5.56.

Me too.
I never thought about socks being ambidextrous....Somebody needs to explain that also.

I know that this is an ancient thread, but the .308 was modeled after the .300 Savage cartridge after WWII, not the 7.5 MAS. Virtually identical to the .300 case, except the 7.62/.308 has a longer case neck, to more firmly hold the bullet when used in full auto weapons.

I found out that the large difference in 5.56 NATO and .223 is that testing method, including the location of the transducer, is WAY different. And that the throat on the 5.56 is made to accommodate different rounds that could over pressure a .223.

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"He was kinda funny lookin'"

I know that works for most people, but what if one has two left feet?

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Formerly Model520Fan

Socks? People actually wear socks??
I am so glad this ancient thread has come back from the dead!

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Still Running Against the Wind

Zombie much.
I thought the .308 was a cu down '06?

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Some men, you just can't reach

That was exactly the rationale of the .300 Savage just after WWI. The Savage Model 99 rifle had been on the market for 20 years, but it had a fairly short action, too short to accommodate the .30-'06 cartridge. After WWI, it occurred to Savage that it might be easier to market the Model 99 if it could be chambered for a cartridge more or less equivalent in power to the .30-'06, so it would appeal to all those Doughboys returning from France where they became very familiar with .30-'06 rifles such as the Springfield '03 and the Enfield 1917. So they just shortened the .30-'06 case so that the loaded cartridge length was short enough to work through the Model 99 action and could be loaded to approximate .30-'06 ballistics, as the Savage 99 action was quite strong. It worked.

During and after WWII, the U. S. Army was looking for new rifle and machine gun designs which would be lighter and handier, and that would necessarily require a lighter and more compact cartridge, preferably one which was already in use, eliminating a lot of ammunition development cost. The .300 Savage best met that requirement. However after some testing, the Army decided that the stubby case neck of the .300 Savage did not provide adequate support to hold the bullet firmly enough for use in full auto weapons, so they simply lengthened the .300 Savage case neck a bit. And Voila! - the 7.62x51 (.308 Win) was born.

I learned something new.

Old thread, but I can relate to the TC's irritation towards the authors of various articles spreading misinformation because unfortunately Investigative Journalism is a lost art, and sensationalism generally attracts attention better than boring old factual information ever will amongst the sort of ignorant folks who act as if it is unreasonable to be irritated by the spread of misinformation.

Fortunately, times change, and in most circles I'm aware of, most folks in the know will tell you that 7.62 and .308 Winchester are indeed interchangeable, so the only folks it effects are the sort who acts like such misinformation isn't worth getting upset over.

It reminds me of the modern day attitudes towards .40 S&W now that it's no longer popular in Law Enforcement and all the articles making blanket statements about how 10mm Auto being a more powerful cartridge without getting into load data or actual facts, so you get ignorant people posting around forums about how their 10mm is more powerful, yet all they ever shoot are 10mm Lite/FBI which is downloaded to similar specs as your average 180gr .40 S&W self-defense load, thinking that they have something substantially more powerful. Don't even get me started on the nonsense about 10mm being as powerful as .41 Magnum.

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Shooting Comfort is bilateral.