This might excite some of you
https://www.youtube.com/watch?v=z4fA3ji3fw4
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This might excite some of you
https://www.youtube.com/watch?v=z4fA3ji3fw4
I will admit, this has peaked my interests!
Its a renamed 6mm Grendel. I have the reamer and a CZ 527 barrel chambered in it if you want to test shoot it.
You can use a 6.5 Grendel bushing die with a 6mm neck bush to resize them.
I also have the little sister cartridge .22 Grendel
Maybe I'm not looking hard enough but what does the 6mm ARC give that the 6.5 Grendel doesn't?
It will do better than the 224 valkyrie did, its supposedly designed to run good through an ar, which is a bit redundant here now sadly, i think the 6gt, 6 creed, 6xc, 243 etc will keep it down here in nz. But in saying that, it will go bang and thats always a good time
But what will it do that 243 wont and we dont have AR's to run it in anymore so its just another good sales thing by Hornady for the US market .
Speed, higher BC and retained energy.Quote:
Originally Posted by Spoon
Equal bullet weight comparison as follows:
6.5 grendel with 107gr TMK, 2550fps
6mm grendel with 108gr ELDM 2700fps
@Wingman with you being in the Waikato, that offer might be a little hard to turn down!
Do you have the barrel currently fitted with some loads ready? :D
Always enjoyed following your different projects!
Yes I think I have some 95gr TMKs or noslers loaded up and barrel can be fitted in about 30 seconds.Quote:
Originally Posted by kiwi-adam
I stand corrected..
In true Hornady fashion they have not just necked down a grendel case.
To maximize on factory ammo, dies and brass sales they have made the base to shoulder dimension shorter than the grendel case but longer than the 6ppc case.
The 6mm ARC is judging by the SAAME listed case head dimensions and the Maximum Average Pressure (MAP) of 52,000 psi, it is based on the .220 Russian case (like the 6.5 Grendel or 6mm PPC). At first glance, the 30-degree shoulder angle and the shoulder diameter of .4301″made me think that 6mm ARC is a necked down 6.5 Grendel, however, the length to shoulder is 1.1207″ which is shorter than 6.5 Grendel’s 1.1507″ (and longer than 6mm PPC’s 1.075″).
The maximum cartridge overall length of 2.26″ (57.4mm) is identical to the max COAL of .223 Remington which means 6mm ARC is designed to be an AR cartridge. The case length of 1.49″ results in a lot of bullet space (.77″ or 3.16 calibers) which will allow loading projectiles with very long ogives and great external ballistic performance. The SAAMI drawing states a muzzle velocity of 2,700 fps for 108-grain bullets.
243 caliber cartridges based on the .220 Russian case have been successfully used by competition shooters with the most popular of them probably being the 6mm PPC. There are several variations of 6mm PPC in the CIP standards, however, oddly enough, neither 6mm PPC nor any of its siblings are standardized by SAAMI. That being said, the 6mm ARC looks like an attempt to have a SAAMI standard cartridge of this very successful case and caliber combination.
Attachment 141690
Mean. Another good match for a mini action. Should have a pbr advantage over the 6.5 grendel. Be a mint mid to lr varmint round
Fit in a mini action. Fire a 6mm bullet out the end using less powder at close to similar speeds with less throat erosion.Quote:
Originally Posted by wayno
The little 6mm varients are all very usefull little cartridges, be great if one of the versions found commercial success. Hornady has a clued up marketing department that's for sure
That is some great marketing.They could have called it a .243 Short, which, although honest, simply won't win any supporters. The AR aspect is pretty much dead in NZ, so it will only really have appeal in mini length actions. I like the short action rifles, and would really consider this as an option, but that depends heavily on availability of components.
"however, the length to shoulder is 1.1207″ which is shorter than 6.5 Grendel’s 1.1507″
One would imagine this dimension is necessary to minimise the chances of Billy-Bob trying to fire the 6.5 Grendel in the ARC chamber. Could get exciting in a bad lawyer driven way if they succeeded....
I've long been daydreaming of building one of the 6mmAR variants or 6mm Grendel on a Mini action. If the ARC becomes available as a factory chambering, Hi-Tec puts out a stock and fit one of the flush floorplate setups, that will be very sweet!
Faster, flatter trajectory, better sectional density, better BC. Military application (which it's designed for) better penetration
The good thing to come out of this is the new 24 cal projectiles that will be come available I will be sticking to the 6mmBR and 6mm Rem
and maybe a 6mm Creedmoor rebarrel on something
Yes indeed, that would be a real nice little combo i reckon.Quote:
Originally Posted by Steelisreal
yeah true. I wonder if factories will ever do 243s in a fast twist to go along with it.Quote:
Originally Posted by shooternz
Like the 7.5” twist 243 Criterion prefit barrel....��Quote:
Originally Posted by stevodog
I don't see a down side to tikka, remmy, ruger etc having 7.5 twist barrels to start with
only a 7.5 twist will over spin the lighter projectiles. Had that happen in a 243ackley, anything under 75grn just turned to a grey cloud 10m out! :wtfsmilie:
oh and my savage with 1:9 does just fine with the Brians 105's and amaxes.
I see, maybe they could do faSt and slow twist like 223s
Does anyone know if howa are bringing in the 6mm arc into nz yet? Looks like it will be a great light weight build with very similar velocity and energy out to 300 yard as the .243.
Yes they are ordered
Does seem to be a design to replace the 5.56mm
But its kind of still a varmint thing no?
More of a medium sized game cartridge. Its factory offerings come in 108gr ELDM and 103gr eldx.
1:8" twist is plenty. Like the grendel its perfect for our game in NZ.
The holdup on the howa mini release is actually ammo availability. Hornady have dropped the ball with this new offering.
Personally I'd be going a bit more wildcat and chambering my own 1:7" twist barrel in 6mm grendel (6mmAR) or 6mm turbo to use all of the little russian case's potential. I understand Hornady moved the sholder back for patent purposes but they should have moved it forward or changed the angle slightly to get more bang bang
Now that the 6GT has SAAMI approval, we might see a few factory production rifles available in this caliber. It’s likely to be more appealing than the 6ARC as you get a bit more bang-bang for your money.
I went googling for the first time since this cartridge was released and now understand why Hornady limited the case capacity on the ARC. It was to reduce pressure for the AR platform.
This cartridge and its blown out wildcat cousins would have far more potential in a bolt gun.
https://www.whiteoakarmament.com/blo...w-6mm-arc.html
That was one consideration @Wingman - but a huge consideration is also that the altered dimensions mean that a 6.5 Grendel round chambered in error won't allow the bolt to go into battery and fire. That would be exciting in all the wrong ways. When careless users are happily picking up magazines full of 300 Blackout and inserting then into a 223 and blowing it up, imagine how much simpler it would be to confuse 6.5 Grendel and 6mm ARC!
That could never happen.. the neck of a 6.5 grendel case would never go into the neck of a 6mm chamber even with a really big hammer.. bit like trying to fit a .308 into a 7mm-08 chamber.. it just wont go.Quote:
Originally Posted by Steelisreal
@Wingman would you know when will be the Howas available in NZ?
Let me find out and report back.Quote:
Originally Posted by atis
They were supposed to be here 2 years ago with the .350 Legends. I see all the new mags coming in lately now have it written on them so it must be happening
End of the year. Maybe.Quote:
Originally Posted by atis
I spoke with my mate at Outdoor Sports a couple of weeks ago and asked him the question. He said to check in with him in early November and he should have a pretty good idea of when they will be distributing to retailers.
Poor mans 6mm PPC!
great little cartridge and extremely versatile. Better varmint round than a 223. gives nothing away to the 243, in fact probably better as its 1:8 so can shoot 105, that factory 243's cant
if only Tikka would chamber for it!, or Howa make left hand mini action!@#$%
