9MMand223only
New member
UncleNick is right, if he wants to get close to military loads, he wants H335. Another one similar is AA2230. Either way, you want around 25.0 grains of H335 with a 55 FMJ, and that is close.
No issue with slam fire in ARs.The Lee Collet Die is a neck-size-only die. Neck sizing is generally considered a bad idea for self-loaders. The odds of getting a slamfire or a failure to feet increase considerably. However, the Lee die produces neck runout that is as low as it gets, so what a number of us do is use it for the case neck and use a Redding Body Die for the case body (it doesn't touch the neck) to get a shoulder a couple of thousandths (some use more) shorter than as-ejected. It's two-step resizing but makes for very concentric cases. There is, at a higher cost, a small-base version of the Redding die available, should your AR turn out to be one of the few that require small-base resizing to feed reliably (most don't).
Yes , But the experiment I did with neck sizing .556 for an AR was a Jam every single time.No issue with slam fire in ARs.
Or any auto loader, semi or full.Yes , But the experiment I did with neck sizing .556 for an AR was a Jam every single time.
Cases were were so hard to extract , I had to sit my charging handle on the edge of a picnic table and hit it really hard to extract the case. Didnt matter if the cases were LC or PPU …
My advice…. Never neck size ever for an AR….
I think that is sound advice. Who even tries it?Yes , But the experiment I did with neck sizing .556 for an AR was a Jam every single time.
Cases were were so hard to extract , I had to sit my charging handle on the edge of a picnic table and hit it really hard to extract the case. Didnt matter if the cases were LC or PPU …
My advice…. Never neck size ever for an AR….