Sizing new brass, IE 9mm Para. I know...

colospgsAVID · May 21, 2010, 11:15 PM

I have always sized my rifle new brass to make sure the case mouth is round. Do you think that the slight belling of my LEE expander will suffice? 'Bout to do a few hundred. I would rather skip the sizing operation. What's your thoughts?

EDIT: I've done it a few times and they look good. I haven't seen any that were really deformed anyway. They all come out with very similar resistance. Bullets start with ease...

Replay13 · May 22, 2010, 01:48 AM

I would size them, bullet setback can be a problem sometimes. Seating the bullet will make them round, lol. If you want to skip something... don't expand or crimp. Just size and seat the bullets, they will hold better that way!
Try a couple and see how it goes before you make up your mind.

If sizing the new cases doesn't make them smaller its wasted too... measure the case before and after, but if you gain a thousand that much better!

riverwalker76 · May 22, 2010, 06:28 AM

As long as they feed through your auto-pistol reliably, and you are just using them for plinking ammo .... why not?

I wouldn't do it, but I know others that have gotten away with it.

Then again ... I'm a perfectionist.

chris in va · May 22, 2010, 11:27 AM

The Lee decapping die also sizes the brass at the same time. Or am I missing something here.

EDIT: Are these new unprimed cases?

CrustyFN · May 22, 2010, 11:49 AM

I size all brass new and used to make sure there is proper tension holding the bullet.

Dave R · May 22, 2010, 02:23 PM

^
This.

arizona98tj · May 22, 2010, 06:02 PM

Just curious......does anyone know if Remington or Winchester or Hornady resizes all of their brass prior to loading it?

May 21, 2010, 11:15 PM	#1
colospgsAVID Senior Member Join Date: January 2, 2010 Location: Colorado Springs Posts: 188	Sizing new brass, IE 9mm Para. I know... I have always sized my rifle new brass to make sure the case mouth is round. Do you think that the slight belling of my LEE expander will suffice? 'Bout to do a few hundred. I would rather skip the sizing operation. What's your thoughts? EDIT: I've done it a few times and they look good. I haven't seen any that were really deformed anyway. They all come out with very similar resistance. Bullets start with ease... Last edited by colospgsAVID; May 21, 2010 at 11:21 PM.

May 22, 2010, 06:28 AM	#3
riverwalker76 Senior Member Join Date: February 13, 2010 Location: Kentucky Posts: 993	As long as they feed through your auto-pistol reliably, and you are just using them for plinking ammo .... why not? I wouldn't do it, but I know others that have gotten away with it. Then again ... I'm a perfectionist. __________________ *Admiral Isoroku Yamamoto* - “You cannot invade the mainland United States. There would be a rifle behind each blade of grass.”

May 22, 2010, 11:49 AM	#5
CrustyFN Senior Member Join Date: June 4, 2006 Location: West Virginia Posts: 2,258	I size all brass new and used to make sure there is proper tension holding the bullet. __________________ I don't ever remember being absent minded. Last edited by CrustyFN; May 22, 2010 at 04:04 PM.

May 22, 2010, 02:23 PM	#6
Dave R Senior Member Join Date: January 7, 2000 Location: Idaho Posts: 6,073	^ This. __________________ I am Pro-Rights (on gun issues).

May 22, 2010, 06:02 PM	#7
arizona98tj Senior Member Join Date: December 10, 2007 Location: Arizona Posts: 980	Just curious......does anyone know if Remington or Winchester or Hornady resizes all of their brass prior to loading it? __________________ stu-offroad.com Largest Jeep TJ project site on the web! (now with guns)

May 22, 2010, 01:48 AM	#2
Replay13 Junior Member Join Date: April 26, 2010 Posts: 9	I would size them, bullet setback can be a problem sometimes. Seating the bullet will make them round, lol. If you want to skip something... don't expand or crimp. Just size and seat the bullets, they will hold better that way! Try a couple and see how it goes before you make up your mind. If sizing the new cases doesn't make them smaller its wasted too... measure the case before and after, but if you gain a thousand that much better!

May 22, 2010, 11:27 AM	#4
chris in va Senior Member Join Date: December 26, 2004 Location: Louisville KY Posts: 13,806	The Lee decapping die also sizes the brass at the same time. Or am I missing something here. EDIT: Are these new unprimed cases?