looking to build a calb. between my 6.8spc and my .308 i want to keep it on ar 15 chassis to keep weight down i dont mind giving up some entergy and gain sum distance split them as close as i con i have everything but barrel i have .556 and a 6.8 bolt assy and complete yhm assy i also have a .204cal 416ss bull barrel that rnd will really fly, about 4300fps with 22 inch barrel and was really flat for such a smsll rnd just not enuff ugh behind it can anyone help? thanks
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