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Reloading Berger Bullets

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6br dasher=unbelievable performance!

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  #1  
Unread 04-06-2005, 08:02 PM
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6br dasher=unbelievable performance!

I just got through with my second load development test today with my 6br improved and I thought it was interesting how awesome this cartridge is. I fired a total of 21 different loads involving 2 powders and 3 different primers behind a 105 AMAX and out of 21 loads, 20 had a standard deviation in the <font color="blue"> SINGLE DIGITS!! </font>

My largest group at 100 yards in thick mirage was .8" and I had several loads that were in the .2's with one going into the .1's!

At 1000 yards in swirling wind, it had no problems hitting my 15" gong if I doped the wind right. Later on in the evening, it shot a nice 7.5 inch 6 shot group of which I was well pleased.

I started at 30.0 grains of Varget and ran up to 32.5. 31.5 grains of Varget and a Fed205gm primer yielded an avg velocity of 2928 and an sd of 1! 32.5 grains gave 3013 fps with an sd of 6. I also tried RL15 and it shot extremely well, and was just slightly slower than Varget giving about 35 fps slower velocity with same charge.

I bought into the suggestion on 6mmbr.com to run a cci 405 magnum primer to get an extra 100 fps more than the Fed or Win primers and I can honestly say that was a load of horse pucky. With the same charge, the cci primer was only 4 fps faster in my gun than the Fed or WIn primer. They did shoot well however, but then again, so does anything else that I want to stuff into that chamber!

I am running about .0015 thousands clearance on this brass and use a .262 bushing for sizing.

My barrel is 26.5" long Krieger 4 groove, 8 twist. This combo gives what I believe to be the <font color="red"> ULTIMATE 1000 yard practice </font> cartridge going. Yeah sure, my 22-250 improved fast twist drops less at 1k, and my six-five two eighty-four beats just about anything I've run it against on a windy day, but it is just a pure joy to burn only 31.5 grains of powder and hear it ping the gong at 1k every shot.

If you are considering getting into the 1k game, and a budget keeps you from buying powder and barrels by the truckload, you should really treat yourself to the 6 br improved fast twist. [img]/ubbthreads/images/graemlins/wink.gif[/img]

Here is a pic of the little boom stick:
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  •   #2  
    Unread 04-06-2005, 09:12 PM
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    Re: 6br dasher=unbelievable performance!

    Darn you! Now you make me want to get a new toy! [img]/ubbthreads/images/graemlins/grin.gif[/img]
    That is a sweet gun!
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      #3  
    Unread 04-06-2005, 10:27 PM
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    Re: 6br dasher=unbelievable performance!

    Sweet rig man and great performance also! Thats not much of an appetite for powder at only 31 grains for all that performance either! Wish my RUM only used 31 grains!!
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      #4  
    Unread 04-07-2005, 05:11 AM
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    Re: 6br dasher=unbelievable performance!

    Goodgrouper ,
    Is your action sleeved ? Have you blanked off the magazine ? Trying to work out whether the 6 BR will feed thru my Rem 700 mag .
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      #5  
    Unread 04-07-2005, 06:33 AM
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    Single digit SD\'s - 95% of the time???

    Hey Greatgrouper, [img]/ubbthreads/images/graemlins/grin.gif[/img]

    Incredible results. Just curious though; how did you prep/sort your brass and bullets to get those amazingly low (and consistently low) SD's????

    Is there a difference between the 6BR Imp and the 6Dasher"?

    Inquiring minds want to know.

    VH
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      #6  
    Unread 04-07-2005, 08:45 AM
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    Re: Single digit SD\'s - 95% of the time???

    GG-- the horse pucky is for better ES, and a possibility at increased velocities -- nothing is for sure dude.

    the PATTERN is: increased velocity (cause it is a hotter primer) and better ES, not to mention better resistance of blanking.

    I have a brick BR-4's, 450's and 205ms to try when mine is together, cause i KNOW nothing is absolute in this game--use what works [img]/ubbthreads/images/graemlins/wink.gif[/img]

    Advice was published based on the PATTERN with these rifles, kind of like 45gns of varget and a 175SMK in a 308---works for MOST, but not all [img]/ubbthreads/images/graemlins/wink.gif[/img]

    Looks like you have something that works.

    VH--there are many different imps, the dasher seems to have the longest usable neck, and seems to be the best option if you are going to IMP a BR -- my smith just kicked a lot of arse with a dasher this weekend.

    Good luck.

    JB
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      #7  
    Unread 04-07-2005, 08:45 AM
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    goodgrooper little help

    I am building a 6.5 twist 22 cal for 1000 yard shooting to shoot wildcats 100 grain bullets. I am between the 22 br the 22 brx and 22 dasher. Seeing the performance of your 6 dasher do you think the brx case will give you close to the same speed. Where did you get dies or did you make them. I was going to use a 28 inch barrel. I heard the brx and the dasher give close to the same performance, the slight edge going to the dasher. any input would be helpful good shooting nice gun
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