need 6mmBR info

[cjmac]

So iv never owned a 6mmbr and im thinking of having one soon. What are the pros and cons about it ?

 

[hogpatrol]

Have you checked out this page?

http://www.accurateshooter.com/cartridge-guides/6mmbr/

 

[cjmac]

Oh thank you

 

[lpreddick]

pros: you will absolutely jump for joy at it's inherent accuracy. cons: all your other guns will rust from non use. 3/8 inch groups at 100 yds will no longer be acceptable.

 

[25AI260]

pros: 6Br is great...

cons: 30Br is better... makes bigger holes, you'll most likely ever wear the barrel out

 

[jonbearman]

Pro's= cheap to shoot and better barrel life than the .243 and similar cartridge's and your other rifles will get dusty from non use. Like others have said,1/2 moa will seem like a shotgun group compared to the 6BR.

 

[Dave T]

What 30EX said:

Cons; You WILL build another one.

or is that a Pros?

Which is what I just did, one wasn't enough. Another pro: Not only is it an excellent bench rest caliber but the 6BR is also an excellent varmint caliber.
Dave T

 

[lpreddick]

yes on it's performance as a varmint gun! i went the usual route as a varmint hunter: .223, 22-250, 243. tried a 6mmBR but used an 8 twist and it shot the heavies but too slow and the wind got me. tried again with a 14 twist and SHAZAMM! i can push 60 grs near 3600 fps and the hammering 68s at 3450+ fps. many a ghog has been "harvested" and once hit, they did not move...DRT! i have over 680 rounds and the lands are as sharp as day one.

 

[Dave T]

lpreddick,

Same with me, except I started with a 14 twist and I too was a 22-250 and 6MM Remington ground hog shooter. I joined this forum a few years ago and got sold on a 6BR, the folks in here were telling me that a 6BR will do what a 22-250 will do and more, well how could they say it was better then my 22-250, blasphemy. Well after I bought a 6BR and shot it over my Ohler and started killing varmints, I was sold and I now have two.
Dave T

 

[GSPV]

I'm all down with the 6 BR. I'm all down with a faster, lighter bullet.

I do think that you'll find that the long-heavies with the 8 twist have less wind drift than the faster/lighter/slower twist recipe. Even at only 100 yards, the long-heavy-but-slower has about 2/3rd the drift of a short-stubby-but-fast pill. At longer ranges, it's more dramatic. For example, at 500 yards, it's down to a little more than half the drift of the short-stubby.

As I said, I'm all for the short-stubby-fast solution for varmint guns. I just don't want the idea that that solution has less wind drift to propagate. It doesn't.

A simple rule of thumb is that, at anything like realistic velocities, ballistic coefficient tells the whole wind story.

For a quick check on that, go to the JBM Ballistics or any other external ballistics program. Compare the Berger 68 gr High BC Flat Base to the Berger 105 gr Hunting VLD or similar. Run the 105 at a reasonable velocity. Say 2900. That's fast, but reasonable. Now, model pushing the 68 gr High BC FB at 4,000. This is a completely unreasonable velocity. Look at the drift. The 105 @ 2,900 is still less than the 68 at the completely hypothetical/unreasonable 4,000 fps.

 

[4xforfun]

yes on it's performance as a varmint gun! i went the usual route as a varmint hunter: .223, 22-250, 243. tried a 6mmBR but used an 8 twist and it shot the heavies but too slow and the wind got me. tried again with a 14 twist and SHAZAMM! i can push 60 grs near 3600 fps and the hammering 68s at 3450+ fps. many a ghog has been "harvested" and once hit, they did not move...DRT! i have over 680 rounds and the lands are as sharp as day one.

So, exactly how slow were you pushing the heavies??? I punched in to the computer a 68 berger at 3450 and the old 108BT at 2800 (very reachable with a 6br) and SHAZAMM!!! the drift on the little 68 is almost twice that of the 108 at any distance you look.

Just sayin,
Tod

 

[Changeling]

Those are some awesome ballistic responses from you guys.