I have around a thousand pieces of once fired .223/5.56 that I plan on reloading. The problem is, I don't currently have any .223/5.56 rifles. I have prepped 20 of these, but before I do the rest of the batch, I need to check feeding/extraction in an AR. I have full length sized the brass with an RCBS FL size die, removed the primer pocket crimp with the RCBS swager, trimmed with a Lee zip trim, primed by hand (Lee auto prime) with a CCI400. I want to make sure that my sizing die sizes enough for the rounds to chamber in an AR type rifle. Sometimes a small base die must be used to get .223 to feed reliably in an AR. I want to make sure I don't need to run this brass through a small base die in order to feed it to an AR type rifle in the future. so, I have 20 fully prepped cases that I would like to give away for free, you just have to load them up, and shoot them out of your AR and let me know if they chamber and extract easily. all the cases are once fired, Lake city headstamped, and prepped as described above.