6mm ARC vs 6mm Creedmoor Shorty?

[texjitter]

Having a chat with a buddy the other day who insisted that a 16" 6mm ARC would outperform a 16" 6mm Creedmoor using the same bullet... (both in bolt guns)

Can somebody else help explain this? My "buddy" is an avid reloader and gun nut, but on paper when I crunch numbers the creedmoor would still outperform the arc by quite a bit based on factory Hornady 108 Eld-M ammo

I currently have a 26" 6 creed barrel but would like to spin on another in 16 or 18" to be a little handier for Texas deer/hog hunting

 

[Phil j]

Creed wins everyday

 

[nhyrum]

Yeah the creed has the advantage, everything else being the same. I just don’t think you could fit a 6 creed in an ar15 platform.


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[Phil j]

He said bolt

 

[nhyrum]

He said bolt

I'm aware. That's just where I think a 6 arc would be the choice over a 6 Creed

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[B23]

It's not even worth a discussion, even in a 16in barrel the 6CM is hundreds of fps faster than the 6ARC.

For me, in a bolt gun the 6ARC has no value but I wouldn't mind having a complete upper in 6ARC for one of my AR15's.

 

[chutinlead]

6ARC will be cool if Howa ever sells it as a barreled action on their mini action. Makes for a crazy lightweight 6.5 grendel in their Howa carbon stalker

 

[Anschutz]

Just playing in GRT, 6ARC would get 2400ish and the 6CM would get 2700ish. Definitely not worth arguing.

 

[wind gypsy]

How does an "avid reloader" figure a cartridge is capable of outperforming another cartridge that has 50% more case capacity?

 

[Anschutz]

Just a quick run through GRT shows the ARC topping out at ~2400 and 6CM around 2700. Not much comparison if you ask me.

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[Hudge]

I’m a Reloader and I have a 6 ARC, though it’s a gas gun. The 6 Creed wins every time, if we are talking velocities. Accuracy wise, I’d say flip a coin.

 

[hereinaz]

How does an "avid reloader" figure a cartridge is capable of outperforming another cartridge that has 50% more case capacity?

He reloads 45 long colt?

 

[seand]

I’d guess it’s tied to the myth that bigger cartridges need more barrel length. Like the saying cutting a 300wm down turns it into a 308win.

Here some good info from way back…..

Been doing a little more experimenting.........

For a long time I have wondered about how barrel length affected velocity. I had always been told you need a certain length barrel for certain calibers. I have read when folks compared one gun to another with different lengths but I always thought that was not an apples to apples comparis...

www.24hourcampfire.com

 

[Anschutz]

I’d guess it’s tied to the myth that bigger cartridges need more barrel length. Like the saying cutting a 300wm down turns it into a 308win.

Here some good info from way back…..

Been doing a little more experimenting.........

For a long time I have wondered about how barrel length affected velocity. I had always been told you need a certain length barrel for certain calibers. I have read when folks compared one gun to another with different lengths but I always thought that was not an apples to apples comparis...

www.24hourcampfire.com

I'd say that for peak performance they do. A large volume of slow burning powder takes more barrel to burn. However a 300WM will always beat a 308 given the same barrel length.

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[seand]

I'd say that for peak performance they do. A large volume of slow burning powder takes more barrel to burn. However a 300WM will always beat a 308 given the same barrel length.

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Not really. The powder is pretty much all burned/turned into gas within the first few inches of barrel length.

 

[180ls1]

6ARC will be cool if Howa ever sells it as a barreled action on their mini action. Makes for a crazy lightweight 6.5 grendel in their Howa carbon stalker

Looks like your prayers have been answered. I can't find the weight but I bet it's the one they mention that is only 4lbs 5oz. Wild.

 

[waspocrew]

I went with the 6 Creed for mine. 18” Bartlein with a Manners CS2 stock.

Tons of great factory ammo options for the 6 Creed… 6 ARC, not so much. 6 Creedmoor is the easy button.

 

[Tahoe1305]

Looks like your prayers have been answered. I can't find the weight but I bet it's the one they mention that is only 4lbs 5oz. Wild.

Buddy had the Grendel mini and just sold it. 4lb 10oz is what his weighed fwiw.

 

[texjitter]

I went with the 6 Creed for mine. 18” Bartlein with a Manners CS2 stock.

Tons of great factory ammo options for the 6 Creed… 6 ARC, not so much. 6 Creedmoor is the easy button.

View attachment 413360View attachment 413359

That is one sweeeet rig!

 

[texjitter]

Here’s the numbers I was getting just for reference