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6.5mm Creedmoor vs 6mm

tone59tone59 Member Posts: 670 ✭✭
edited July 2018 in Ask the Experts
I have been able to find a lot of info on the 6.5 creedmoor including that there is Lupua brass available.
I can find very little on the 6mm.

The caliber will be used for target shooting out to 800m as well as for hunting up to whitetail deer.

As someone that is recoil sensitive the 6mm makes sense but I have to know more about it.
Is there Lupua brass for it?
Is the smaller 6mm moving much faster than the 6.5 thus shortening barrel life?

I have decided on a Browning Hells Canyon which I believe is 6 lbs 9 oz.
I have a 308 Browning A-bolt that is 6 lbs 11 oz and it has become a bit much for me to shoot alot.

Hope to hear comments on these calibers.
Thank You


  • MIKE WISKEYMIKE WISKEY Member, Moderator Posts: 9,752 ******
    edited November -1
    velocity with the SAME b/c bullets will be close between the 2 6lb. 9oz. rifle will do well at 800m
  • rufe-snowrufe-snow Member Posts: 18,649 ✭✭✭
    edited November -1
    Good info here. IMHO, you would be better off with the .243. The 6 mm Creedmore, has very limited capabilities, over the 243. It seems to me more a marketing ploy, than anything else.
  • tone59tone59 Member Posts: 670 ✭✭
    edited November -1
    I disagree with the light rifles can't do well at long range statement.
    I have witnessed otherwise.
    A rifle that shoots great at any distance will also do so at long range if the BC of the caliber is high.
  • MobuckMobuck Member Posts: 12,967 ✭✭✭✭
    edited November -1
    "I disagree with the light rifles can't do well at long range statement."
    And this is why dedicated "long range rifles" have lean, flexie stocks and thin, whippy barrels?
  • sandwarriorsandwarrior Member Posts: 5,453 ✭✭✭
    edited November -1
    The Creedmoors are great cartridges ballistically. What I've had issue with them is feeding as well as a .308 based case from a .308 magazine system. The shoulder is the same diameter, but shorter. So, the taper is flatter. It sits against the feedrails differently and pushes down on the follower differently.

    That said, the ballistics are every bit as good as their counterparts. Most 6mm Creedmoors come in a 1-8" twist. Which will stablize the 105-108 gr. VLD type bullets. They have a bit of trouble keeping the heavier bullets stabilized, especially through the transonic range. That's if you decide to shoot farther out than 800 yds. If you go for an off the shelf .243 instead of the 6mm Creed, you will find most of them come in a 1-10" twist. Not tight enough to get much past 1k. I understand Remington now chambers new .243's to 1-9.25". Better for some bullets but not really good enough to reach out far.

    Barrel life is going to depend on how you load them up, or what factory ammo you buy. Hornady doesn't load them terribly hot. But, they do perform well. Bullets just keep getting better and better.
  • MobuckMobuck Member Posts: 12,967 ✭✭✭✭
    edited November -1
    The 6mm C is nothing more (and maybe less) than a 243 AI with a fast twist barrel.
  • tone59tone59 Member Posts: 670 ✭✭
    edited November -1
    The Hells Canyon has a fluted barrel not a thin whippy barrel.
    Ignorant sarcasm is not helpful.
  • nononsensenononsense Member Posts: 10,934 ✭✭✭✭
    edited November -1

    You will find here and elsewhere that there are devout supporters for every cartridge ever invented and this includes the .243 Win. Here is the statement I make to all of those who think that the .243 is the end all cartridge for 6mm fans:

    The 6mm Creedmoor is the cartridge the .243 Win. should have been if the Winchester designers actually knew anything about designing cartridges correctly.

    Many of us who shoot PRS and hunt with 6mm cartridges enjoy the 6mm Creedmoor for it's performance.

    No, Lapua does not make 6mm Creedmoor brass but Peterson Cartridge Co. does in both the small and large primer configuration. They also produce 6.5 Creedmoor, 243 Win., and 260 Rem. along with about 10 more cartridges:

    This is excellent brass and better yet, it's made in the USA! This is the manufacturer I use when they have the brass I want in stock.

    quote:Is the smaller 6mm moving much faster than the 6.5 thus shortening barrel life?

    This has nothing to do with barrel life. The life is controlled by the amount of powder being burned, how fast it's burning and how hot that burn is. The angle of the ejecta plasma from the case shoulder and neck impinging on the throat is where the shorter life occurs. That's one of the very good reasons to avoid the .243 Win., the shoulder angle.

    Light weight hunting rifles can shoot very accurately when created by a gunsmith who knows how to machine all the parts correctly and then do a perfect assembly with stress-free bedding. Most factory rifles have not proven to be as accurate as required to humanely harvest game at 800 yards. There are and will continue to be exceptions but they are few and far between. Prone with an excellent bipod or rest is the most reasonable solution to minimize the errors of shooting longer ranges.

    Here are some links for reading:


  • charliemeyer007charliemeyer007 Member Posts: 7,346 ✭✭✭
    edited November -1
    If you have recoil issues, I'd start with a proper design stock that fits you. My Carl Gustav in 7mm Rem Mag is a pleasure to shoot, same load in a 700 Remington not so much.

    I'd start my consideration with a comparison of the ballistic coefficients of the bullets you are considering. A higher number bullet that starts out slower might just get there sooner than a lower number that started out faster.

    Shooting well at that distance has many challenges. Doping the wind and getting the range exact when hunting is tough, not that its all that easy at a range with a steady bench, exact range with flags.
  • TfloggerTflogger Member Posts: 3,056 ✭✭✭
    edited November -1
    A Remington 700 in 6.5x55 is a pleasure to shoot, while it drives tacks.
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