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Old November 6, 2012, 01:40 AM   #9
Exibar
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Join Date: November 4, 2012
Posts: 26
I really like 21.5 grains of IMR 4198 for 5.56 in my 1x7 twist AR-15 20" barrel.

I've been loading that for years (ack decades!) and it's been proven to be quite reliable and accurate for me.

Mike B
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