Comments on: Case Grip on Bullet — There’s More to Neck Tension Than Just Bushing Size

By: S. Ostaff

S. Ostaff — Mon, 21 Jan 2019 05:00:30 +0000

I would be curious to hear from others about inside neck surface condition. I STM tumble. I’ve started to use imperial sizing die wax to ensure some lubricity is present. But I have not been able to pin down results of a perfectly clean neck. It doesn’t always or even often result in flyers but I have started to use sizing wax preventatively

By: David Joe

David Joe — Mon, 19 Nov 2018 19:55:36 +0000

I remain curious about how major or minor the force required pass the neck is, relative to engraving, or even compressing the entire bearing length, and pushing the long for caliber bullet down the bore. I envision throwing a fastball at the back of a dragster as the light turns green, physics says I speed up its run, but measurably so?

By: MikeC

MikeC — Sat, 17 Nov 2018 19:59:13 +0000

There are a few things on your list that contribute to pull force but not to neck tension. Completely different matters and testing will always show this.
2 missing are shoulder angle, and whether sizing length is specifically beyond seated bullet bearing.