The Down Range Forum
Member Section => Down Range Cafe => Topic started by: Tyler Durden on January 29, 2012, 12:15:14 AM
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Hi everybody,
You know how the .300 Blackout can be made from .223 brass, right?
How about instead of a .30 cal projectile weighing from 110 to 220 grains for the .300 Blackout....how about a .223 parent case that has been (trimmed down?) and necked up to take a 6.5 mm projectile.
Has that been done already?
The advantage would be the 6.5 X whatever? would fire a lighter weight bullet at a higher velocity than the .300 Blackout and should be flatter shooting than the Blackout.
What say you?
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oh, yeah, just like the .300 Blackout, the advantage would be you keep the same magazines, same lower, same upper, same bolt, same bolt carrier group, and it is just a barrel swap.
;D
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If your goal is a lighter, faster round, why not neck the 5.56x45 down to take .17HMR bullets?
The supersonic .300BLK may only be 110gr, but you're still thumping the target with a .30 cal bullet moving pretty fast, which is a good thing IMHO. Not to mention that the .300BLK has not demonstrated any of the feeding problems of similar "solutions", such as the AK 7.62x39 - at least so far.
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The 6x.223 wildcat is almost as old as the .223 itself. Another .5mm would be easy to do. You would just need to neck it up.
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I like the idea, but then again I like 6.5 bullets. There is the 6.5 Creedmore, but I think that may be more of a .308 based cartridge. What's the .260 Remington?, but i don't think it has much of a following and may be waning in popularity.
I personaaly think it is hard to improve much on the Se 6.5x55. There are some that have been out there, but from what I could see, didn't have much more velocity, and had other problems. .264 Win Mag, the Westerner, and the .264 Rem Mag.
I believe their are the 6.5x.284 and the 6.5-06.
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I think the 6.5 Grendel represents the best that can be gotten out of the AR-15 platform.
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SSK Industries (of J.D. Jones and Whisper fame) has a 6.5 M.P.C. cartridge, that probably describes best what I was thinking:
http://sskindustries.com/6-5-mpc
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I wonder how that differs from the 6.5 Whisper.
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SSK Industries (of J.D. Jones and Whisper fame) has a 6.5 M.P.C. cartridge, that probably describes best what I was thinking:
Yeah, that's a much better choice than the 6.8SPC. I like that. I've been wanting a 6.5 and that might be the ticket. Just have to get a new upper.
The 260Rem could be called the 6.5-308 and wouldn't work on an AR15 platform. It is offered as an AR10 by Panther though.
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SSK Industries (of J.D. Jones and Whisper fame) has a 6.5 M.P.C. cartridge, that probably describes best what I was thinking:
http://sskindustries.com/6-5-mpc
Seems to be a wildcat/experimental round. No commercial ammo, and no powder load references on this site for reloaders. Seems to be proprietary as well, since it was invented by SSK. No indication there is a SAAMI spec either.
I gotta ask - what's the romance with the 6.5?
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I don't necessarily have a romance with the 6.5 anything....
just lately, oh....about the past two months or so, I realized the great effects marketing has had or is having with the .300 Blackout.
Up til December, I had my head buried in the sand for the past two years about the .300 Blackout because I live in Illinois
Somewhere else on another forum, somebody had published the actual commercial loadings for super sonic .300 Blackout ammo. I was looking at that data and scratching my head. ??? That sounds like what an AK 7.62X39Russian bullet can do, huh? With the same rainbow like trajectory, huh?
So not to be a Debbie Downer here, then I thought the only real reason for the hype of the .300 Blackout round was you get to keep the same everything on your AR, same bolt, same mags, and do a barrel swap and VOILA! you're shooting a 220 grain .308 calibered bullet sub sonically through your muzzle can if you live in one of those free-er states.
I have an AR that is chambered in 7.62X39Russian.
So I started thinking that would be great if we could get a 6.5mm caliber bullet maybe at about 110 grains flying closer to 2,700 fps that would be flatter shooting beyond 200 yards than the .300 Blackout.
So that is where I got the idea to neck down a .300 Blackout case to take a 6.5 bullet instead.
Somebody else on another forum clued me in that J.D. Jones/SSK Industries had already beat to the idea.
Ahh...shucks!
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What ever happend to the 6.5 grendel?
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What ever happend to the 6.5 grendel?
Alexander Arms gave up the proprietary thing, and got a SAAMI spec on the round. Too late to quash the new buzz about the .300BLK and it still requires a new upper instead of just the barrel. IMHO the Grendel is as dead as the 6.8REM SPC.
My question re romance and the 6.5 is due in part to Alf's comment, but also due to the fact that there seem to be a half dozen or so "official" 6.5 cartridges.
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Ah, the romance of the 6.5 is it's ballistic coefficient, giving it long range "super powers".
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Here's something that gives the .300 an edge over the 6.5.
The components come from the 2 most common calibers, the .223/5.56 casing and .308/30-06 bullets.
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if I am going to have to reload either cartridge and with me living in this less free state where suppressors aren't allowed, then I would rather have a cartridge with the better exterior ballistics....errr....a flatter trajectory at super sonic speeds than the .300 Blackout.