If your son will look for and get a Wylde chamber he should never need a small base die. The Wylde chamber is the best of two worlds, accuracy and function. It also gives the best results for the widest variety of 223-5.56 ammo. Today that chamber is used in most new, good quality uppers.
Now having said that, military brass is what it is and if you pick up some 223 fired in a SAW, nothing might fix it, like the 308 and the Mini-Gun. The SAW and Mini-Gun stuff can be scrap when it hits the ground.
Ed
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The three Rs: Respect for self; Respect for others; and responsibility for all your actions.
"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take, but as for me, give me liberty, or give me death!"
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