Originally Posted by
scaggly
Sorry. Been out of town all week.
On the neck-sizing, just bear in mind that .223 headspaces off the shoulder, and every time you fire a round, the case stretches to fill and seal the chamber, which will see the shoulder move also. Neck sizing doesn't bump the shoulder back into spec.
Its up to you, but I personally wouldn't want to fire your ammo. You might get lucky 9,999 times out of a 10,000, but that one time it goes wrong it might ruin your whole day (or your rifle, or your face).