The die will keep the bullet centered as the case rises into the die. It's a little more labor intensive than loading pistol ammo, but I load .223 'flat bases' on the Lee Classic Turret and they come out fine. Try keeping your fingers on the bullet until it enters the seating die.
A big +1 to this! When I load 9mm, I can just place a bullet on the case and raise the ram into the seating die. With .223 and M43, I have to guide the bullet into the seating die as I raise the ram. It does slow the process down a bit, bit it sure beats picking 55gr pills off the floor! Oh, and be careful not to pinch your fingers.
they 1) are all crimped at mid-cannelure or higher, per Lee, and the crimp loods good--and they all drop beautifully in to a max cart gauge. The LOA is 2.255+--which barely fits in my (Brownell's) magazines. But, they do fit, and they chamber just fine.
Good, that's the way to do it. OAL is not as important with plinking ammo as it is with benchrest/target/precision ammo. I try to seat my .223 and M43 bullets as deep into the cannelure as possible (for a shorter OAL), as long as I am not below the minimum length.
My local reloading store recommended H335,
Yup, it's one of the most popular powders for .223. It is the commercial equivalent of WC844, the military powder used in 5.56 ammo.
As I play with the Lee Auto Powder Measure and that aftermarket charge bar, I expect that I will be able to adjust the PTED die 'height' so that the finish of the charging side will be on a full upstroke--can that be done?
I don't know, try it. I adjusted mine as per Lee's instructions. The rifle charging die can crush your cases; it is different from the pistol die. I just raise the ram high enough for the powder to drop and that's it. The Turret press lever/arm can give you a tremendous amount of leverage. Enough that you can crush a case. Much like priming on the press and sizing, you have to be cognizant of how the handle feels. For example, if you're priming and feel a lot of resistance, stop. You might blow a primer. For sizing, if it's rough to push the case into the die, it'll probably be hard to pull it out. Lower the ram, add some more case lube, and try again. For charging, raise the ram enough to see, hear, and feel the powder drop activate, then lower the ram.
can someone explain well preferences for full-length or neck sizing? Full-length resizing intuitively appears unnecessary if one uses the same carts in the same rifle.
Neck sizing only sizes the neck, full length sizing sizing sizes the entire case and the neck. Neck-only sizing can only be done if you're firing specific brass in a specific bolt-action rifle. Once it has been fired in that rifle, that case is now fireformed to that rifle only. Semiautomatic chambers (especially military rifles) are a bit more generous and the cycling of the action means that the entire case must be full length resized for it to chamber reliably.