Why is the neck, right by the bullet, expanding out enough to fail the gauge check? The cases are fine before the bullet is placed in teh neck. Doing it with two different seating dies? Defeated by the picture up load as well. Good night.
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Why is the neck, right by the bullet, expanding out enough to fail the gauge check? The cases are fine before the bullet is placed in teh neck. Doing it with two different seating dies? Defeated by the picture up load as well. Good night.
Did you bell the case mouth before seating? I use the Lyman M die for this. Maybe you belled the case mouth to much. Are the bullets the correct diameter if to large will cause this. Are you crimping after bullet seating?
If you are crimping, and crimping with your seating die, if your cases are a little too long, it could bulge the neck a little
Aggressive chauffeuring appears to solve the problem. No belling, no crimping. The brass is in spec for length but just. Might trim more next time. The nick knacks for .223 are killing the save money model.
I trim my brass to 1.75 some go smaller
Assuming properly processed brass, proper bullets, the LEE Factory Crimp die solves most of these probs.
Seat, but don't crimp, with your seating die, then crimp with the FC. C.O.A.L. grows
2-4 thousandths between seating and crimping; easy enough to adjust for.
Neck tension tends to be more uniform.