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Yup, that jives with my conclusions as well about 55 and 60gr bullets in the .223. Speed kills accuracy in my rifle. I've found my best accuracy out of my 20" HBAR Colt was at 24.5grs of 748. 25 yielded about 1.25", 26 was up to 2.5" 26.5 was almost 4" (all at 100yds). I haven't gone down to 24 or lower yet, but now I'll have to try! Just out of curiosity, what rifling twist and barrel length is your Ruger .223?
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