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I'm running 68gr horn match over 4.8gr of IMR SR 4759, REM 7 1/2 primer WIN brass, out of a 20" 1/8 twist AR 5.56 chamber with the gas system closed. This load cronys in at 1010 clean barrel, after a few shots speeds increase to around 1040 works great for bustin squirles at 100yds. Oh by the way 4.8 gr of 4759 dose not soak up alot of case space. If your scared go to CHURCH!!
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