Resizing question

blackhawk8 · March 14, 2009, 01:27 PM

Is it necessary to resize your brass if the measurements are ok? I have been resizing all mine and trimming. It would save lots of time if didnt have to resize.

Thanks Blackhawk8

rwilson452 · March 14, 2009, 02:04 PM

Only if you want the bullet to fit in the case correctly. Yes, you need to resize.

As to trimming, I never trim my straight wall pistol cases. I trim my rifle cases every time to ensure they have a mouth that is square to the case. I'm a bit anal for accuracy. It is only necessary to trim when the case exceeds max length.

Quote:

Resizing question
Is it necessary to resize your brass if the measurements are ok? I have been resizing all mine and trimming. It would save lots of time if didnt have to resize.

Thanks Blackhawk8

mkl · March 14, 2009, 05:07 PM

+1 to what rwilson452 said.

I believe if you will take one of your fired cases before resizing and place a bullet in the case, you will see what he means.

The bullet will most likely slip freely in and out of the case mouth.

Resizing reduces the case mouth diameter so that it will hold a bullet firmly.

hardhit · March 14, 2009, 05:18 PM

It also removes the spent primer.

amamnn · March 14, 2009, 11:05 PM

You would like the neck to be sized properly and something like straight. You would be close enough to correct to say that cases never expand and rebound to the same shape they were before you fired the round.

jamaica · March 14, 2009, 11:46 PM

Quote:

Is it necessary to resize your brass if the measurements are ok?

Yes!

**Unclenick** · March 15, 2009, 12:01 AM

As the others said, you will need to size the neck for bullet fit. However, you do not need to resize the rest of the case every time. Get a Lee Collet die if you want to try neck sizing only. You might also be able to use your regular sizing die for neck sizing by just sizing the case until the neck sized most of the way to the case shoulder, but stopping short of that. Provided your chamber dimensions are not generous, that can work. If you have a wide chamber you may find the sizing die tend to squeeze the sides of the case before the neck has enough sizing. That can elongate the headspace and make chambering impossible.

March 14, 2009, 01:27 PM	#1
blackhawk8 Senior Member Join Date: March 26, 2005 Posts: 115	Resizing question Is it necessary to resize your brass if the measurements are ok? I have been resizing all mine and trimming. It would save lots of time if didnt have to resize. Thanks Blackhawk8

March 14, 2009, 11:05 PM	#5
amamnn Senior Member Join Date: May 13, 2006 Location: WA, the left armpit of the USA Posts: 1,323	You would like the neck to be sized properly and something like straight. You would be close enough to correct to say that cases never expand and rebound to the same shape they were before you fired the round. __________________ "If the enemy is in range, so are you." - Infantry Journal

March 15, 2009, 12:01 AM	#7
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	As the others said, you will need to size the neck for bullet fit. However, you do not need to resize the rest of the case every time. Get a Lee Collet die if you want to try neck sizing only. You might also be able to use your regular sizing die for neck sizing by just sizing the case until the neck sized most of the way to the case shoulder, but stopping short of that. Provided your chamber dimensions are not generous, that can work. If you have a wide chamber you may find the sizing die tend to squeeze the sides of the case before the neck has enough sizing. That can elongate the headspace and make chambering impossible. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

March 14, 2009, 05:07 PM	#3
mkl Senior Member Join Date: April 25, 2008 Location: DFW area, Texas Posts: 494	+1 to what rwilson452 said. I believe if you will take one of your fired cases before resizing and place a bullet in the case, you will see what he means. The bullet will most likely slip freely in and out of the case mouth. Resizing reduces the case mouth diameter so that it will hold a bullet firmly.

March 14, 2009, 05:18 PM	#4
hardhit Senior Member Join Date: August 18, 2008 Posts: 343	It also removes the spent primer.