Maybe a new idea for a new AR15 rifle cartridge, 6.5 X something or another

[Tyler Durden]

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!

[MAUSERMAN]

What ever happend to the 6.5 grendel?

[Pathfinder]

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.

[alfsauve]

Ah, the romance of the 6.5 is it's ballistic coefficient, giving it long range "super powers".

[tombogan03884]

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.

[Sponsor]

[Tyler Durden]

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.