Headspace Variation in Resized Cases?


PDA






Chris Rhines
January 27, 2008, 06:07 PM
I'm trying to do some load development for my .223 AR, using a Lee Reloading Press and a Redding Competition full-length sizing die with bushing. During the sizing operation, I'm getting a lot of variation in the headspace of my sized cases. I'm trying to size to a headspace of 1.460", and I'm getting 4-5 thou of error between cases. All the cases are once-fired Remington commercial.

What could be going wrong here?

- Chris

If you enjoyed reading about "Headspace Variation in Resized Cases?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
USSR
January 27, 2008, 06:18 PM
What lube are you using?

Don

Chris Rhines
January 27, 2008, 06:34 PM
One-Shot. Works very well.

30Cal
January 27, 2008, 06:57 PM
They're not going to come out exactly the same. Variation will be made worse if the inside of the case necks aren't lubed. Either way, as long as they cycle fine, the affect on accuracy is nil.

Chris Rhines
January 27, 2008, 07:03 PM
Variation will be made worse if the inside of the case necks aren't lubed. I should have mentioned - I removed the expander ball from the sizing die, using the neck bushing alone. Nothing touches the inside of the case neck.

I can accept a little variation, but 5 thou? That cannot be good for accuracy, especially when I'm trying to test a new load.

- Chris

USSR
January 27, 2008, 07:30 PM
One-Shot. Works very well.

Cough, cough, er, if you say so.:rolleyes:

Don

Chris Rhines
January 27, 2008, 11:12 PM
*shrug* I've been using One-Shot for several years and many thousands of rounds. It has never given me any trouble. The trick is to let it dry for 5-10 minutes before you start loading. If you just spray it on your brass and go to town, you'll get stuck cases.

Anyhow, I stuck the sizing die back in my Dillon and my troubles all went away. There may be a couple Lee single-stage presses for sale, cheap, in the next couple days.

- Chris

If you enjoyed reading about "Headspace Variation in Resized Cases?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!