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within limits drawn around us by the equal rights of others. ~ Thomas Jefferson
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Enemies of Liberty are ruthless. To own your Liberty, you'd better come harder than your enemies..
For serious purposes, why bother with either caliber?
If domestic hostilities do commence, we will have to either rely on battlefield pick-ups or supplies from foreign powers. Having your main weapon chambered in a caliber that nobody else uses would be highly inconvenient, to say the least.
What makes a "manstopper" is the man with his finger on the trigger, not some fraction of a gram of bullet weight or couple of millimeters of case length. If you can shoot, one intermediate cartridge is about as good as another.
On the 6.8 the kinetic energy is supposedly a bit higher than the 5.56mm, but I haven't seen any 'real world data'. It's too new, and hasn't been used in any actual conflict that I know of to get any real and accurate reporting. Why are ye inquiring about the stopping power of the 6.8, ye interested in a REC7?
Personally as new as it is, I'd consider it still an 'oddball' caliber that would probably be more trouble than it's worth. There would have to be a real, tangible, serious advantage over 5.56mm to bother making or buying a rifle in this caliber.
As for the .300 Blackout, no clue beyond what I can find online, and that's just general data. To be honest, I never even heard of this caliber until just now. I've not been up on such things in quite some time. But again, there'd have to be a serious advantage to go with an oddball caliber.
Unless of course you totally planned on manufacturing your own ammo and wanted to ensure that should any of the firearms you also manufactured fell into the wrong hands, that they wouldn't be able to feed them for very long. (Unless ye replaced the upper with something that ate 5.56mm of course...)
I couldn't find any equivalent velocity data with a bullet grain lower than 110 for 6.8 The difference in the rounds performance from what I could see is not that great but for work inside 200 yards with a round that small you want the maximum velocity you can get. Or some say that. Under present conditions and availability I can't see any advantage in switching from 5.56x45 to 6.8 at all. Now if the military went to 6.8 that could change.
I have no real knowledge of the .300 blackout so can't say except again caliber availability would weigh in.
I've read that the 6.8 and the 6.5 Grendel both have higher energy and longer effective range. The Grendel is supposed to still be supersonic at 1000 yards. I have a friend with a 6.5 Grendel AR. I will try to get out shooting with him and see if we can put up some test targets to compare. I've read that the rationale for the 300 blackout was to have an option for a suppressed subsonic round. Problem is, that just pretty much makes it a pistol caliber carbine.
I'm with the above gents. Too many choices today for EVERYTHING...let alone rifle calibers. I know fuck-all about 6.8mm or 300 Blackout or any other "exotic" ammo. If I have to make a decision on a rifle, it'll be something so common I can find cases of it just about everywhere.
30-06, 5.56, .308, 7.62x39/54r...or whatever is the preferred choice of our enemy...should just about cover it I would think.
They're both superior to 5.56 on paper, but plentiful ammo is better than none.
The way I see it though, .300 blk has the distinct advantage of requiring only a barrel change.
Thus, if you wanted to hedge your bets, all you would need is a spare barrel in 5.56.
Realistically though, even in an apocalyptic situation, you'd still be able to roll your own .300 blk assuming you had even basic reloading tools; the parent case is 5.56, and as long as the sides of the brass are still good (since you cut off the shoulder anyway) you can use some or all of your trash 5.56 brass to make .300 blk brass, and as long as you have std .308 bullets and powder, then you have everything you need.
.300 blk is the only credible conversion caliber for the ar15 platform that I have yet seen. As I said above, worst case you hedge your bets with a a spare 200 dollar barrel and a barrel wrench (which you should already have).
I owned a very nice 6.8SPC Spec II upper and used it to hunt Whitetails one year. Little recoil and darn near .308 performance on game. As a go to weapon for defense (or offense) it is a non starter due to ammo cost and availability alone. .300BLK is interesting if you like shooting with a can, but honestly it's real uses are limited as far as I am concerned. A suppressed .22 is more useful to my mind. -55six
For serious purposes, why bother with either caliber?
ReplyDeleteIf domestic hostilities do commence, we will have to either rely on battlefield pick-ups or supplies from foreign powers. Having your main weapon chambered in a caliber that nobody else uses would be highly inconvenient, to say the least.
What makes a "manstopper" is the man with his finger on the trigger, not some fraction of a gram of bullet weight or couple of millimeters of case length. If you can shoot, one intermediate cartridge is about as good as another.
On the 6.8 the kinetic energy is supposedly a bit higher than the 5.56mm, but I haven't seen any 'real world data'. It's too new, and hasn't been used in any actual conflict that I know of to get any real and accurate reporting. Why are ye inquiring about the stopping power of the 6.8, ye interested in a REC7?
ReplyDeletePersonally as new as it is, I'd consider it still an 'oddball' caliber that would probably be more trouble than it's worth. There would have to be a real, tangible, serious advantage over 5.56mm to bother making or buying a rifle in this caliber.
As for the .300 Blackout, no clue beyond what I can find online, and that's just general data. To be honest, I never even heard of this caliber until just now. I've not been up on such things in quite some time. But again, there'd have to be a serious advantage to go with an oddball caliber.
Unless of course you totally planned on manufacturing your own ammo and wanted to ensure that should any of the firearms you also manufactured fell into the wrong hands, that they wouldn't be able to feed them for very long. (Unless ye replaced the upper with something that ate 5.56mm of course...)
I couldn't find any equivalent velocity data with a bullet grain lower than 110 for 6.8 The difference in the rounds performance from what I could see is not that great but for work inside 200 yards with a round that small you want the maximum velocity you can get. Or some say that. Under present conditions and availability I can't see any advantage in switching from 5.56x45 to 6.8 at all. Now if the military went to 6.8 that could change.
ReplyDeleteI have no real knowledge of the .300 blackout so can't say except again caliber availability would weigh in.
I've read that the 6.8 and the 6.5 Grendel both have higher energy and longer effective range. The Grendel is supposed to still be supersonic at 1000 yards. I have a friend with a 6.5 Grendel AR. I will try to get out shooting with him and see if we can put up some test targets to compare. I've read that the rationale for the 300 blackout was to have an option for a suppressed subsonic round. Problem is, that just pretty much makes it a pistol caliber carbine.
ReplyDeleteVJ
I'm with the above gents.
ReplyDeleteToo many choices today for EVERYTHING...let alone rifle calibers.
I know fuck-all about 6.8mm or 300 Blackout or any other "exotic" ammo.
If I have to make a decision on a rifle, it'll be something so common I can find cases of it just about everywhere.
30-06, 5.56, .308, 7.62x39/54r...or whatever is the preferred choice of our enemy...should just about cover it I would think.
They're both superior to 5.56 on paper, but plentiful ammo is better than none.
ReplyDeleteThe way I see it though, .300 blk has the distinct advantage of requiring only a barrel change.
Thus, if you wanted to hedge your bets, all you would need is a spare barrel in 5.56.
Realistically though, even in an apocalyptic situation, you'd still be able to roll your own .300 blk assuming you had even basic reloading tools; the parent case is 5.56, and as long as the sides of the brass are still good (since you cut off the shoulder anyway) you can use some or all of your trash 5.56 brass to make .300 blk brass, and as long as you have std .308 bullets and powder, then you have everything you need.
.300 blk is the only credible conversion caliber for the ar15 platform that I have yet seen. As I said above, worst case you hedge your bets with a a spare 200 dollar barrel and a barrel wrench (which you should already have).
-HSR47
Thanks
DeleteRecommended to me by a savvy cat:
ReplyDeleteLessons learned from 100000+ rounds of .300 blackout:
http://www.youtube.com/watch?v=tgKjbySsAik&feature=youtu.be
More useful info:
http://haleystrategic.com/blog.php
YMMV.
ca
wrsa
Interesting videos. Makes a good case for the 300 Blackout. Might have to look into that.
DeleteVJ
Interesting videos. Makes a good case for the 300 Blackout. Have to look into it more.
DeleteVJ
I owned a very nice 6.8SPC Spec II upper and used it to hunt Whitetails one year. Little recoil and darn near .308 performance on game. As a go to weapon for defense (or offense) it is a non starter due to ammo cost and availability alone. .300BLK is interesting if you like shooting with a can, but honestly it's real uses are limited as far as I am concerned. A suppressed .22 is more useful to my mind. -55six
ReplyDelete