Mid Caliber AR 15 Round ?

[Moonie]

Been looking at a 6.5 G for the past few year for yotes and wolves. 223 is nice just looking for something with alittle more energy and range. Have both gassers and bolts in 223 and 308. Basically, looking for a new cartridge to mess with. Looked at the 300BO and it is just as spendy to reload for as the 308 and doesn't offer any range advantage.

As above posters have said, parts, brass, data and factory ammo are available.

He was looking for a mid caliber AR round based on the .223/5.56. I've been loading for the 300BO for years, it is considerably cheaper than 308 as brass is cheap and you can shoot cast at full jacketed velocities. The powder consumption is much less than 308, heck I can load subs at about the same cost as 45acp...

The 6.5G and the 6.8SPC are both great mid cartridges however neither are based on the .223/5.56, I know, I load both of those as well and they do tend to be more expensive as to get full power out of them I use condom covered boolits. FYI, my sons 6.5G is a tack driver with the ammo it prefers, I'm talking 3 in 1 hole at 100...

[Rufus Krile]

And don't forget the elderly Skeeter Skelton 45/223 Jug....

[Texas by God]

I just loaded ammo for my .300 Blackout and the cost per round is about a dime. Maybe.

[garym1a2]

For 300 blkouts I like the lee 155 gr loaded to get 1850fps

[Iowa Fox]

What length barrel & gas system are you guys using for your blackouts? I like the sound of a dime a round.

[wlc]

I've got a 16" with carbine gas. If I had to do it over again I would go with pistol gas. Pistol gas on an AR gives you more options on powders.

[nagantguy]

Just finished my 300!between Christmas and New Years and so far I'm having an blast, it has done something that hasn't happened in a while, it has lived up to its hype, brass is easy to make and I've used several j word options and two cast boolits thus far and have been happy, no giddy like a 12 year old boy at Christmas! More than enough smack for yotes and deer and hogs and other critters , see it as a viable option for battle as well, as far as it's long range capabilities, my scope has dope out to 400, haven't tried it yet past 200 but if you look at it as a more streamlined 30-30 that's good to 350.

[dbosman]

The Blackout talks brings up one of my warnings to youth. All you kids under forty.
Let some company using automated equipment reform your blackout brass. We can replace knees, shoulders, and hips, but you really don't want to wear out your wrists.

[DougGuy]

Stayed out of the AR game so far b/c I don't really like the 5.56 at all, and they didn't make one in .308 when I was in the market for one so I waited. The 300 AAC got popular but it's no more of a player downrange than an SKS with 7.62x39, pretty much a 100yd cartridge as far as hunting goes. I am still waiting for the right caliber, and so far the ARX has come closest to what I would consider the perfect AR load. I still entertain the thought of a stretched out 10mm case and a 200gr .400" boolit do they make one of those yet or would it be just a heavier 100yd cartridge?

I have read a bit about the .30 ARX it is similar to the blackout but offers a hefty performance gain. 6.5 Grendel necked to .30 with 38gr water capacity compared to 24.3gr for the 300 AAC.

Attachment 186113

Attachment 186114

http://bulletin.accurateshooter.com/...beats-300-blk/

[Harter66]

There is the 22 Nosler now available . I haven't dissected the drawings but it looks to be the 6.8 case slightly longer with a rebated head to fit the 223 bolt .
Mechanically you should be able to neck that up to 358 for a 358 MPG or to the more conservative dies and bullets available 6.8 and pick up a bolt later for an actual 6.8 .

Truth be told I have to wonder why there isn't x39 AI for the AR guys . The biggest hassle is feeding and the special mags to accommodate the case taper . Remove 2/3-3/4 of that taper and now it works in a 6.8 mag and bolt and all you have to do is fire form from a 5-10 round mag .

[Moonie]

There is the 22 Nosler now available . I haven't dissected the drawings but it looks to be the 6.8 case slightly longer with a rebated head to fit the 223 bolt .
Mechanically you should be able to neck that up to 358 for a 358 MPG or to the more conservative dies and bullets available 6.8 and pick up a bolt later for an actual 6.8 .

Truth be told I have to wonder why there isn't x39 AI for the AR guys . The biggest hassle is feeding and the special mags to accommodate the case taper . Remove 2/3-3/4 of that taper and now it works in a 6.8 mag and bolt and all you have to do is fire form from a 5-10 round mag .

Interesting on the 22 Nosler, might have to have one of those.

[dkf]

Stayed out of the AR game so far b/c I don't really like the 5.56 at all, and they didn't make one in .308 when I was in the market for one so I waited. The 300 AAC got popular but it's no more of a player downrange than an SKS with 7.62x39, pretty much a 100yd cartridge as far as hunting goes. I am still waiting for the right caliber, and so far the ARX has come closest to what I would consider the perfect AR load. I still entertain the thought of a stretched out 10mm case and a 200gr .400" boolit do they make one of those yet or would it be just a heavier 100yd cartridge?

I have read a bit about the .30 ARX it is similar to the blackout but offers a hefty performance gain. 6.5 Grendel necked to .30 with 38gr water capacity compared to 24.3gr for the 300 AAC.

Attachment 186113

Attachment 186114

http://bulletin.accurateshooter.com/...beats-300-blk/

The .30 Rem AR is more popular than the 30ARX but not by a huge amount. Don't know why it didn't catch on but it outperforms the .300blk by a considerable margin. It is based off of .450bushmaster brass.

[xacex]

Hmm. Got the wheels spinning again on a 6.5 wildcat idea with this one. 260 Nosler perhaps.

[slownsteady22]

Buy 300 bo barrel remove, 223/556 barrel shoot 308 bullets. It's that simple that's why it is IMO only an easy choice.

Sent from my SM-G925R4 using Tapatalk

[6bg6ga]

Have had at least a 1/2 dozen 300 blackouts and love them. I would however love to see an AR in 22-250.

[popper]

why there isn't x39 AI for the AR guys Cheap import ammo. WW still wants $17 a box. 40WT is pretty close to X39.

[Thundermaker]

There is a 6mm×45 where you just neck 223 brass up. Barrels are available.

[bkbville]

30 ARX?

Let me get this right... you take the 7.62x39 neck it down to 6.5 to make the 6.5 Grendel, then you neck it back up to .30 (.308 instead of .311) and you have a 30 ARX?

And you still need new magazines....

Be better off buying a rifle in a more interesting caliber - the whole rifle instead of just an upper - and work from there.

Of course I have to say this tongue and cheek as I have 223, 7.62x39, 300BLK, 6.5Grendel, and 458 SOCOM uppers... but if I'm truthful with myself the 223 and 458 are the only two that don't smell of complete compromise in their categories.

[DCM]

30 ARX?

Let me get this right... you take the 7.62x39 neck it down to 6.5 to make the 6.5 Grendel, then you neck it back up to .30 (.308 instead of .311) and you have a 30 ARX?

And you still need new magazines....

Pretty much.
Gotta change the shoulder and body taper Slightly to add a Little case capacity, not much though.

[Idaho Sharpshooter]

300 BLK is so easy. Just a barrel and a bit of filing on the mag for perfect feed.

Greg S,

reassess your data. The 300 BLK treads closely on the heels of the 7.62x39, and costs about 1/3rd the powder of the 308 Win. The NOE 247gr boolit load I use is about 1046fps from an 11" barrel, and suppressed, the loudest thing is the bolt carrier group cycling.

John,
we praying the headaches go away man.

Rich