Re: Reloading for the AR-15
I saw the mention of the Type-S FL die, but your later mention of neck sizing may have thrown me a bit. Sorry for the confusion, but no problem at all. You'll see a lot of stuff out about loading for ARs that really confuses the issue. They're not difficult to load for, but they are a bit different. They NEED to be treated differently than your bolt guns. I'm a huge believer in case gages when loading for Service Rifles, and use them religiously. Headspace becomes critical here, to avoid all sorts of nasty surprises. Primer seating is another area (in connection with headspace) that requires a bit of extra attention, especially in the context of avoiding slamfires. Powder selection is pretty easy here if you're sticking to the heavier bullets; RL-15 or Varget. Poll the Service rifle shooters at any HighPower match, and I'll guarantee that it'll be about an even split between these two. There's others that work well too (VV N135, N140, etc) but these two are probably 95% of what you'll find on line. You can also disregard the usual comments about a 10% reduction when using miltary brass. Perfectly valid when talking about 30-06 or 7.62 military brass, but not so with the 5.56mm stuff. LC's production brass has virtually identical capacity to most commercial stuff, and actually a bit more than some that I've seen.
Always worth floating an idea around here! Good feedback from multiple sources and levels of experience, and that exchange of info is almost always a good thing.