Author Topic: 243 Headspace (Read 848 times)

rmtaylor · « **on:** May 01, 2005, 07:01:41 AM »

I just ran into something interesting and it may be normal, I don't know. I have a Stoney Point head and shoulders gage and was checking the headspace. Here are the results:

WW New Brass 1.618
WW once fired from the same batch 1.618
After Full length Resize 1.619

Does that make sense?

Remington Brass(same gun, 243 Handi)

Using the same die
Once fired 1.623
Full length resized 1.621

It is close but just did not make sense. By the way I checked 5 of each so this is not just a sample of one.

Richard

bajabill · « **Reply #1 on:** May 02, 2005, 03:43:56 AM »

Yes, alittle odd

The win brass doesnt grow with fireing??

FLS can stretch it a little when the expander plug is pulled out of the neck

handirifle · « **Reply #2 on:** May 02, 2005, 04:05:35 AM »

Make sure you are lubing the INSIDE of the case neck on the 243 brass. I always found that helped prevent that. Plus it seemed to make bullet seating easier too.

Mac11700 · « **Reply #3 on:** May 02, 2005, 05:13:50 AM »

Can you mike the rim thickness???

Mac

rmtaylor · « **Reply #4 on:** May 02, 2005, 02:13:15 PM »

Mac

New unfired brass .016
Once Fired after full length resize .016

Richard

JPH45 · « **Reply #5 on:** May 02, 2005, 02:46:00 PM »

I would expect that anyone would see that mount of difference one way and the other with different brasses. Lot to lot brass will be surprisingly consistant, but at the same time different. SAMMI specs for chambers and brass will allow for as much as .010" in length between a minimum length case and a max length chamber. The very few thousanths you're seeing are hardly worth talking about. It fact it speaks surprisingly well of the closeness of your chamber and your dies. I'd be curious about the fired and sized diameters of the case at the jucture of the body and shoulder, and the same of the neck

RugerNo3 · « **Reply #6 on:** May 03, 2005, 03:02:28 AM »

If there are concerns on headspace, necksizing is an option, but that's a whole nuther ballgame with an ejector system as on the original handi's. Extraactors would make a difference.