6cm vs 6arc

[Unckebob]

AR- 6 arc
Bolt- 6 creed

I went with the 6ARC because it was designed from the start to shoot from a 20." It will easily have enough velocity to kill a deer at 400 yards.

With a suppressor, there is zero recoil.

The 6CM would be my choice for a longer range rifle.

 

[Bluumoon]

Boring answer is you already have rifles that aren't hampering much of anything, get a .223 if you don't have one, that's the bigger gap vs what you have. Cheaper and more readily available ammo, will never wear it out. The 6.5CM is fine.

I say that, but am waiting on a 6cm to round out the options on hand.

Edit: Just realized this is an old post. Hopefully you scratched the itch and still need a .223

 

[SloppyJ]

6 Creed would be a straight rebarrel, expect about 25% less recoil than a 6.5 creed.

6 ARC is a different bolt face so you'd have to research if you can have your existing bolt bushed smaller. I'd also research if people have used the standard bdl magazine that CA uses successfully with 6 ARC sized cartridges. If putting in a rokstok you could revise bottom metal set up as well for something more specialized for 6 ARC but that's more $ again.

I think I could be happy with 6 ARC velocities in 22"+ barrel but i would not be happy with 22"+ barrel with a suppressor. Thus my current primary hunting rifle is a 18" 6 Creed.

Putting factory 108 and 140 ELDm ammo in a calculator with assumed powder charges i get the following recoil results in a 9# rifle:
6 ARC: 6.9# recoil
6 Creed: 9.7# recoil
6.5 Creed 12# recoil

The differences are greater if you use a lighter rifle.

This all day. I was in the same boat. I chose an 18" 6cm for the same reasons. I wanted short, suppressed, and fast. The 6arc lost on the velocity. I have no regrets but still want a 6arc. Current plans are building a thermal AR rig in 6arc where I think it shines.

 

[teph45]

6ARC is super popular in AR15s - it's actually designed for that.