6mm br or 284 win

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Canadian Bushman, Jan 16, 2014.

  1. 6mm br

    67.2%
  2. 284 win

    20.7%
  3. Neither

    12.1%
  1. Canadian Bushman

    Canadian Bushman Well-Known Member

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    Two calibers ive been eyeballing for a while and with my new 308 build finishing up i have an extra 308 S/A that im debating using for one of the above. It will mostly be used for punching paper and steel and some short to mid range hunting.
     
  2. Broz

    Broz Well-Known Member

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    I have a 6 br and it will complement your .308 perfectly in your line up. $26/100 for bullets and 30 gr on powder in Lapua brass. Targets to 1000. Easily obtained accurate loads. No recoil. What's not to like?

    Not to mention a great small caliber hunting rifle for deer and antelope, coyotes, wolves, prairie dogs, Rock chucks, etc

    Jeff
     

  3. MudRunner2005

    MudRunner2005 Well-Known Member

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    Neither... Go 6.5-284, or a 6.5 Grendel.
     
  4. Varberger757

    Varberger757 Well-Known Member

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    For the purpose of mainly shooting at paper and steal it's the 6mm br of course! gun)
     
  5. Hunter2678

    Hunter2678 Well-Known Member

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    This is a tuffy for me bc I own both, haa!. But for a paper puncher and midrange steel specifically, Id go the 6br route. Cheap to reload for, mild recoil, top end accuracy, long barrel life and idiot proof to load tune. You should routinely be shooting .30 moa or better at 100yds with a decent load all day long. Makes a nice varmint round too. The gun always brings a smile to my face. Might need some mag modifications to have it feed reliably however. Thusly mine's a single shot.

    On the other hand my .284's sole purpose is to fill my desire for a high bc, good barrel life havin, LR fun gun niche. Its fire breathing overkill for shortrange paper and steel and thats why I built it for LR steel plates and other related mischief. Its also built on a stiller single action so I can seat the 162-180s with no feeding or COAL issues.
     
    Last edited: Jan 16, 2014
  6. Canadian Bushman

    Canadian Bushman Well-Known Member

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    Im kinda leaning toward the 6br. Easy to shoot, accurate and barrel life are gonna be three requirements for this rifle, and i think it would work a little better than a 284 win in a S/A

    I am really drawn to the B.C. Of 7mm bullets for some reason, and im never against having good energy down range.

    I like the idea of a. 6.5-284 but i think it chews through barrels too fast for me. I like to shoot a lot.
     
  7. Canadian Bushman

    Canadian Bushman Well-Known Member

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    I really like the sound of that!
     
  8. Hunter2678

    Hunter2678 Well-Known Member

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    So did I, one of the main reasons I decided to build one..:D
     
  9. Trickymissfit

    Trickymissfit Well-Known Member

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    the little 6BR is just a great little round. It's probably the most efficient round out there, and is also one of the most accurate rounds out of the box. With the 105/107 grain class of bullets, there are a lot of folks out there getting close to 2900fps. Now last time I looked that is pretty close to what the big cases are doing. I am pretty much maxed out at 3050fps with the 6/250 improved case (it will do 3100fps with a very hot load), and that's with about 50% less powder. Still the comparison is with the .284 case. A good size for the 7mm bore without a doubt. But bullets with similar velocities and similar B/C's have similar trajectories. The 107 Sierra has a B/C of about .55 or maybe .53 (I'm getting old and memory is shorter). I can push that bullet to 2850fps with a real good stiff load. The .284 shooting the 154 grain bullet will do similar velocities with a similar B/C. But the 162 grain Amax is another story with a .62 B/C. It'll hit the 2750fps mark with a heavy load of 4831, and should shoot a little flatter. But you'll also know it everytime you pull the trigger. Add to this, that the average Joe is wanting to use a short action Remington (known to be somewhat shorter than the others out there), and you bring to light another issue that few discover till it's too late. The .284 round shows 2.995" over all length. Kinda makes it look better (on paper) with a standard length action. The Savage short action is a little longer, and that would help. Still I think a single shot action is the ticket here. But with the 6BR you have a gazillion actions to choose from.
    gary
     
  10. Canadian Bushman

    Canadian Bushman Well-Known Member

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    Can the 6br push 115 gn bullets fast enough to make good use of them or is it better to stay around 105gn. I like heavy bullets.
     
  11. Broz

    Broz Well-Known Member

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    I wish I could say and I will watch for some first hand experience on that. I started with the 105's and 107's in an 8 twist 4 grove Krieger. When one of the first loads put 5 into a pencil eraser group at 180 yards I quit and never looked back. I am not joking when I tell you I would call a head shot on a mouse with this rifle at 100 yards. The amount of head shots on gophers out to 200 is way more than a few.

    30 gr of RL 15 gets me 2830 fps from a 28" with the 107's. But I will be switching from this powder when I run out. Too temp sensitive for me. On a warm day past 500 I tend to shoot over very small stuff.

    Jeff
     
  12. Canadian Bushman

    Canadian Bushman Well-Known Member

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    I hear so many people say they just dumped some powder in the case and it shot a bughole. I cant help but be intrigued.
    My first impression is that a tight twist with a 115gn bullet might be just a bit too slow, so it seems running the 105 class with a 1:8 twist might be a safe bet. Im in no hurry to get on this project so i will have lots of time for research.
    What powder are you looking at to replace the rl15?
     
  13. Broz

    Broz Well-Known Member

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    Probably Varget
     
  14. Canadian Bushman

    Canadian Bushman Well-Known Member

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    Varget is probably one of the least temp sensitive powders that ive played with. If i knew more about reloading when i was using it i may have never tried anything else.