So built my first AR upper from scratch and I'm beyond happy with it and wanna do some more. Would like to do a upper specifically for cast .223. I've had had decent enough luck with .55gr lee boolits out of my 1/7 twist 5.56 16" ( decent plinking accuracy and function of the weapon ) but would like to build some that more optimized for this need. I remember there being talk of optimum barrel length and twist compared to what I was using but can't seem to locate it. So if those folks wouldn't mind repeating what would be a good place to start when it comes to barrel selection for a cast specific AR. 55gr - 75 gr cast PC GC pills will be the main thing.
Thank
O and my new "poverty Precision" built that I must say I'm very proud of
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