I want a 6.5 AR in a 5.56/223 case like the 300BO
- Thread starter kimberkid
- Start date
Ohen Cepel
Contributing Member
Why not a 6.5mm Grendel?
I would think something out there would work for you without going wildcat. About anything which can be mashed into an AR mag has been done I think.
Sorry if I am not tracking. What are you trying to do with said round?
I would think something out there would work for you without going wildcat. About anything which can be mashed into an AR mag has been done I think.
Sorry if I am not tracking. What are you trying to do with said round?
brewer12345
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You want a 6.5 Grendel. You need a special bolt, but otherwise it fits the general 223/556 pattern guns.
Riomouse911
Contributing Member
6mm or 6.5 TCU perhaps? (Thompson-Center Ugalde). It was a silhouette-deer round in the TC Contender pistol.
It may be too long for the magazine, tho.
Stay safe.
It may be too long for the magazine, tho.
Stay safe.
ECVMatt
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I have wanted a 6x45 or 6x47 (off the .222 Mag case) for years. One of those in a compact rifle would be both fun and reasonably lethal. Of course none of this has anything to do with a 6.5 BO in an AR though, but I get where you are coming from.
As others have stated, the 6.5 Grendel might be the closest thing to what you are looking for off the shelf.
As others have stated, the 6.5 Grendel might be the closest thing to what you are looking for off the shelf.
marksman13
Member
OP, if I’m tracking, it sounds like you want the same bolt face and case dimensions as a 5.56 with a 6.5mm projectile. I’m assuming you want this cartridge in order to use the same bolt and mags and just swap out a 5.56 barrel. No such creature exists outside the wildcat realm.
Legionnaire
Contributing Member
@kimberkid, what's your purpose for the round? 6.5 Grendel was my first thought, too.
Ohen Cepel
Contributing Member
I think I get your ask better now.
6.5 PCC is out there, I never heard of it till I went looking for an option;
rifleshooter.com
Article from 2014, so I'm not sure it took off. But, is a start point.
6.5 PCC is out there, I never heard of it till I went looking for an option;
6.5 Patriot Combat Cartridge (6.5 PCC) Review
6.5 Patriot Combat Cartridge (6.5 PCC) Review I am a big fan of 6.5 mm (.264″) cartridges and the idea of a new 6.5mm wildcat for the AR15/M-16 quickly caught my attention. Known as the 6.5 …
rifleshooter.com
Article from 2014, so I'm not sure it took off. But, is a start point.
Looks like a "I got money to burn" option.I think I get your ask better now.
6.5 PCC is out there, I never heard of it till I went looking for an option;
6.5 Patriot Combat Cartridge (6.5 PCC) Review
6.5 Patriot Combat Cartridge (6.5 PCC) Review I am a big fan of 6.5 mm (.264″) cartridges and the idea of a new 6.5mm wildcat for the AR15/M-16 quickly caught my attention. Known as the 6.5 …
Article from 2014, so I'm not sure it took off. But, is a start point.
2012 looks to be the last update for their website.
http://illirianengineeringc.ipage.com/products-and-service-info.html
I have a couple 300 BO AR-15 rifles and a 6x45 AR-15 rifle.
I like 300 BO, and I only shoot supersonic 300 BO. It is a good cartridge out to 80-100 yards for defense purposes. It beats wearing out an USGI WWII 30 carbine in a similar role.
6x45 has the same approximate case as the 223 Rem but with a heavier bullet and similar powder capacity. It's performance would not be as good as a 223 Rem.
Just as 300 BO has found a niche, 6x45 may find one as well in the lower power cartridge arena.
I like 300 BO, and I only shoot supersonic 300 BO. It is a good cartridge out to 80-100 yards for defense purposes. It beats wearing out an USGI WWII 30 carbine in a similar role.
6x45 has the same approximate case as the 223 Rem but with a heavier bullet and similar powder capacity. It's performance would not be as good as a 223 Rem.
Just as 300 BO has found a niche, 6x45 may find one as well in the lower power cartridge arena.
Varminterror
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I’d bet a shooter could get away with a 6.5-300 blk with just a bushing die, but the performance of a 28grn H2O cartridge with the interesting bullets a 6.5mm bore offers just lags way too far behind a 22% larger 6.5 Grendel… not to mention, the fact one requires custom components, while the other is a fully supported factory option…
If I had a massive amount of 223/5.56 brass, rather than choosing the hard road of wildcatting an underperforming cartridge, I would SELL the 223/5.56 brass and use the proceeds towards Grendel brass.
horsemen61
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Can I ask Why it’s the easy button for what you want I have multiple Grendel’s and I love them?
rdnktrkr
Member
There is a 6x45 since you don't want a Grendel
Shawn Dodson
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I have a .25-45 Sharps upper.
It's a nice 200 yd cartridge. Accurate.
I have reloading dies and can form brass from 5.56/.223 brass.
Varminterror
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I’m not sure I’d want to spend a few hundred bucks for a custom reamer, more to have the barrel made, then worry about conjoining components to make a custom die, or having a custom die made, to get an 6.5mm AR cartridge with an under-capacity case which falls short of the Grendel, just to avoid getting a 6.5 Grendel just because I subjectively didn’t want one…
What about a 6 ARC, or 6.8 SPC? Or 25-45 Sharps?
A guy could neck down a 300blk easily enough, then you’re just stuck with a custom reamer and barrel, and can probably get away with using a different bushing in a common die… but a lot of work for no reward.
What about a 6 ARC, or 6.8 SPC? Or 25-45 Sharps?
A guy could neck down a 300blk easily enough, then you’re just stuck with a custom reamer and barrel, and can probably get away with using a different bushing in a common die… but a lot of work for no reward.
greyling22
Member
6mm mongoose?
OP
OP
kimberkid
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I don’t have a reason why except I got the idea it would be a cool cartridge to have and I just want one … no rhyme or reason.
Legionnaire
Contributing Member
If you have the spare resources, go for it … and report back on progress and final package.
Riomouse911
Contributing Member
Necessity was the Mother of invention. Money is what makes it happen. 
6x45, 6x47, 6mm TC/U, (or 6.5 in each sounds like what you might want.
Sounds like a fun project. Good luck finding the one!
Stay safe.
6x45, 6x47, 6mm TC/U, (or 6.5 in each sounds like what you might want.
Sounds like a fun project. Good luck finding the one!
Stay safe.
mokin
Member
@kimberkid I don't blame you. It sounded cool to me too. I looked into it....
Before I go too far here's a picture.
From top to bottom are the
.308 Winchester
300 Blackout
6.8 SPC
6.5 Grendel
224 Valkyrie
.223 Remington
The thing about putting a 6.5 mm bullet in a .223 Remington case is that 6.5 mm bullets are long and skinny. If you want to make it fit in an AR-15 size rifle, you end up stuffing enough of the bullet into the case that it diminishes cases capacity to the point where performance is impacted. The other alternative would be to make a longer action rifle. I found most people who really wanted to do that were advised to go with an AR-10 chambered in .260 Remington.
It was some years ago when I was doing this research. Things might have changed. Hopefully somebody more current can chime in.
Before I go too far here's a picture.
From top to bottom are the
.308 Winchester
300 Blackout
6.8 SPC
6.5 Grendel
224 Valkyrie
.223 Remington
The thing about putting a 6.5 mm bullet in a .223 Remington case is that 6.5 mm bullets are long and skinny. If you want to make it fit in an AR-15 size rifle, you end up stuffing enough of the bullet into the case that it diminishes cases capacity to the point where performance is impacted. The other alternative would be to make a longer action rifle. I found most people who really wanted to do that were advised to go with an AR-10 chambered in .260 Remington.
It was some years ago when I was doing this research. Things might have changed. Hopefully somebody more current can chime in.
