30-06 case capacity ?

06shooter · January 25, 2015, 09:06 PM

Are Winchester , Remington , Nosler etc........ 3006 cases the same volumes and does the seating depth change these capacities ?
Wikipedia says 68.4 of h20
Nosler has 60.2 h20, but this changes with different bullet weights in the Nosler manual .

MightyMO1911 · January 25, 2015, 09:23 PM

No they're not all the same. I don't concern myself with changing the seating depth buy this variance is one of the reasons we are warned against starting with the maximum load. If we start at max and have a case with less volume we change the pressure. Start low. Work up.

reynolds357 · January 25, 2015, 09:25 PM

Case capacities usually vary slightly by manufacturer. They even vary among lots from the same manufacturer. The deeper you seat, the less powder the case can physically hold.

06shooter · January 25, 2015, 10:02 PM

Thanks guys !

hartcreek · January 27, 2015, 02:48 AM

So as always when working up your load for a rifle caliber...... after you have sized and trimmed and primed seperate your cases by headstamp then weigh them and start loading with the heaviest cases as they will have the least volume.

06shooter · January 27, 2015, 08:28 AM

I read that a lot of people use mixed brass for the same cartridge and claim good accuracy, how is this achieved ?

Bart B. · January 27, 2015, 09:29 AM

Good accuracy across different makes/lots of brass means different things to different people. But I don't think mixed brass properly reloaded for use with the same bullet with maximum charges in a decent rifle shooting one group would cause accuracy worse than 1 to 1.5 MOA. With loads a few grains below maximum, accuracy would probably be better.

AllenJ · January 27, 2015, 09:43 AM

Quote:

Good accuracy across different makes/lots of brass means different things to different people.

+1 Bart.

Did these people define what "accuracy" means to them? To one person it could be minute of soda can, yet to another it can be minute of angle.

I was taught and have always separated my brass by headstamps.

Bart B. · January 27, 2015, 10:17 AM

Having shot max loads in all sorts of headstamped new brass in 7.62 Garands as well as .308 Win brass with different headstamped new and properly reloaded brass in different bolt guns I've been amazed at how little difference that makes. No discernable accuracy difference within each one and little difference in zeros at 100 to 200 yards across all of them. Case weights across them ranged from 149 to about 180 grains.

Sorting brass by weight's the most important in my opinion. I don't think different headstamped brass of the same weight causes any problems except the full length sizing die may need to be set differently to get the same amount of shoulder setback on fired cases due to metalurgy differences.

06shooter · January 27, 2015, 10:39 AM

Thanks !!!!

kraigwy · January 27, 2015, 11:40 AM

Read "Secrets of a Huston Warehouse", where people used a 300 yard warehouse to develop determine how to get a one hole shotgroup.

You'll find a lot of information about the importance of brass and brass prep in accurate shooting.

http://bulletin.accurateshooter.com/...assic-article/

Bart B. · January 27, 2015, 04:26 PM

Kraig, a fair comparison bullet to what was shot in the Houston warehouse getting sub .050 inch groups is Sierra's 30 caliber 168 HPMK. In the 100-yard indoor range at their California plant they shot a lot of sub .100 inch 10-shot groups with good lots of bulets. Rail guns were used in all tests. All cases were not prepped in any way but just full length sized to be fired in standard SAAMI spec chambers; no tight anything around the cases.

Sierra's 22 caliber match bullets at the time would often shoot .050" 10-shot groups; again, with full length sized unprepped cases.

It's a lot easier to make perfect 50 to 70 grain short jacket 22 caliber bullets than 168-grain 30 caliber ones.

January 25, 2015, 09:06 PM	#1
06shooter Senior Member Join Date: January 18, 2015 Posts: 165	30-06 case capacity ? Are Winchester , Remington , Nosler etc........ 3006 cases the same volumes and does the seating depth change these capacities ? Wikipedia says 68.4 of h20 Nosler has 60.2 h20, but this changes with different bullet weights in the Nosler manual .

January 25, 2015, 10:02 PM	#4
06shooter Senior Member Join Date: January 18, 2015 Posts: 165	Thanks guys ! Last edited by 06shooter; January 25, 2015 at 10:16 PM.

January 27, 2015, 11:40 AM	#11
kraigwy Senior Member Join Date: June 16, 2008 Location: Wyoming Posts: 11,061	Read "Secrets of a Huston Warehouse", where people used a 300 yard warehouse to develop determine how to get a one hole shotgroup. You'll find a lot of information about the importance of brass and brass prep in accurate shooting. http://bulletin.accurateshooter.com/...assic-article/ __________________ Kraig Stuart CPT USAR Ret USAMU Sniper School Distinguished Rifle Badge 1071

January 27, 2015, 04:26 PM	#12
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Kraig, a fair comparison bullet to what was shot in the Houston warehouse getting sub .050 inch groups is Sierra's 30 caliber 168 HPMK. In the 100-yard indoor range at their California plant they shot a lot of sub .100 inch 10-shot groups with good lots of bulets. Rail guns were used in all tests. All cases were not prepped in any way but just full length sized to be fired in standard SAAMI spec chambers; no tight anything around the cases. Sierra's 22 caliber match bullets at the time would often shoot .050" 10-shot groups; again, with full length sized unprepped cases. It's a lot easier to make perfect 50 to 70 grain short jacket 22 caliber bullets than 168-grain 30 caliber ones. Last edited by Bart B.; January 27, 2015 at 06:30 PM.

January 25, 2015, 09:23 PM	#2
MightyMO1911 Senior Member Join Date: February 8, 2014 Posts: 122	No they're not all the same. I don't concern myself with changing the seating depth buy this variance is one of the reasons we are warned against starting with the maximum load. If we start at max and have a case with less volume we change the pressure. Start low. Work up.

January 25, 2015, 09:25 PM	#3
reynolds357 Senior Member Join Date: December 10, 2012 Posts: 6,165	Case capacities usually vary slightly by manufacturer. They even vary among lots from the same manufacturer. The deeper you seat, the less powder the case can physically hold.

January 27, 2015, 02:48 AM	#5
hartcreek Junior member Join Date: April 22, 2014 Location: Washington Posts: 1,549	So as always when working up your load for a rifle caliber...... after you have sized and trimmed and primed seperate your cases by headstamp then weigh them and start loading with the heaviest cases as they will have the least volume.

January 27, 2015, 08:28 AM	#6
06shooter Senior Member Join Date: January 18, 2015 Posts: 165	I read that a lot of people use mixed brass for the same cartridge and claim good accuracy, how is this achieved ?

January 27, 2015, 09:29 AM	#7
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Good accuracy across different makes/lots of brass means different things to different people. But I don't think mixed brass properly reloaded for use with the same bullet with maximum charges in a decent rifle shooting one group would cause accuracy worse than 1 to 1.5 MOA. With loads a few grains below maximum, accuracy would probably be better.

January 27, 2015, 10:17 AM	#9
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Having shot max loads in all sorts of headstamped new brass in 7.62 Garands as well as .308 Win brass with different headstamped new and properly reloaded brass in different bolt guns I've been amazed at how little difference that makes. No discernable accuracy difference within each one and little difference in zeros at 100 to 200 yards across all of them. Case weights across them ranged from 149 to about 180 grains. Sorting brass by weight's the most important in my opinion. I don't think different headstamped brass of the same weight causes any problems except the full length sizing die may need to be set differently to get the same amount of shoulder setback on fired cases due to metalurgy differences.

January 27, 2015, 10:39 AM	#10
06shooter Senior Member Join Date: January 18, 2015 Posts: 165	Thanks !!!!