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STW advice, please

 
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  #1  
Old 12-04-2011, 09:50 PM
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STW advice, please

I have a cooper 7 stw, which only allows for about 3.65" oal in mag. Freebore runs about quarter inch or more. I have tried various combos with 140 vld, 180 vld, and 160 accubonds, new, fl sized Remington brass, retumbo or us 869, 215m primers. Run out fixed to sub .001". Everything sprays 1 to 1.5" at 100. I expect sub 1/2 moa from my coopers. Any recommended bullets that jump well? Load combos? Any help appreciated.
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  #2  
Old 12-04-2011, 10:01 PM
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Re: STW advice, please

Just for curiosity pick your best load and seat it longer and single feed, see if you get a better grouping. I dont have a Cooper , but have looked at plenty of one hole targets at Sheels to know they shoot. I have got my Weatherbys to shoot w/ freebore. If the rifle likes them seated further, you might be able to do a mag,mod.
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Old 12-04-2011, 10:03 PM
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Re: STW advice, please

Try H1000.
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  #4  
Old 12-04-2011, 10:05 PM
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Re: STW advice, please

Thanks. I'm sure bergers will shoot close to lands, but I do not want to modify mag, and have heard stw needs freebore to reduce pressure.
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  #5  
Old 12-04-2011, 10:07 PM
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Re: STW advice, please

I just bought some h1000, will try it. Any ideas on bullets that jump well?
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  #6  
Old 12-04-2011, 10:40 PM
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Re: STW advice, please

I have had good luck w/ AB'S and Barnes
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  #7  
Old 12-04-2011, 11:07 PM
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Re: STW advice, please

Bergers don't mind being jumped. I have found there are two lengths that they will group equally well in most cartridges. A short length and a long one. In my 300 win mag they will shoot at 3.34 and 3.580.
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