AR-10 .308 vs AR-15 300BLK (or .223/5.56 instead of 300BLK)

Not familiar with the 30-30… is it the same shell casing, same length, and such - but different slug geometry?

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It’s not much different than the .30-30 and I have a hard time believing anyone who has ever touched a gun hasn’t heard of the cartridge that has killed more deer than all of them put together but it was more of a wise crack about in my opinion theres just way too many cartridges out these days and it never stops. If someone develops a round that will go 25 FPS faster than this one will and all of a sudden we should use it for our military round, or sumtin ya
know? Just a pet peevie of mine that’s all. I keep nodding off texting, I’ve had to re do it three times now lol

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They both shoot 30 caliber, i.e. 0.308" diameter bullets, but the 30-30 is usually a lever action rifle, and the 300 Blackout is usually (maybe always) an AR platform. I’m not sure I understand @Mark712 close comparison to it because a 30-30 delivers roughly 2,000 ft-lbs of muzzle energy vs. the 300 Blackout at 500 to 1,300 ft-lbs of muzzle energy.

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Like I said they just come up with to many cartridges anymore, maybe I should have compared it to a .308 or something. Without getting to scientific about it my point is/was you can’t tell me that there isn’t a cartridge that won’t do what it will do and or is that different to where you / we need a entire new cartridge to do what it does. Again the mkt is getting flooded with cartridges that’s all. And I ve been into guns for long enough that all the ft lbs and all don’t impress me anymore as well

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If anyone wants a cartridge that will do it all all over the world try a 8MM Magnum, now that’s a cartridge, voted by hunters all around the world as the # 1 best!

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