David, yes it's the potential effect on accuracy that concerns me about the variability in neck length. And it just seems odd that quality brass that was very uniform to begin with ends up with so much neck length variation after fire forming and a couple of reloads. I know that competition shooters strive for absolutely uniformity with every case, in an effort to get the most consistent velocity and accuracy. I'm sure you're right that the effect on accuracy is imperceptible in most rifles.
