Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Case sorting???

 
LinkBack Thread Tools Display Modes
  #50  
Old 01-27-2011, 04:44 AM
Bronze Member
 
Join Date: Nov 2010
Location: Helena, MT
Posts: 96
Re: Case sorting???

Quote:
Originally Posted by Hookturnr View Post
Call me stupid if you will but.....During the pressure event of firing the loaded round in the gun, wouldn't all cases regardless of previous volume then be expanded to the walls of the chamber of the rifle and thus have an exactingly consistent volume from round to round during the pressure event? The only thing left to change case volume at this point would be the dimensions of the base and web and this should be easily found via weight sorting I would think

just a thought..
Except for variances in case wall thickness from round to round. That's where brands and lots make quite a difference.

-- gr8whyt
Reply With Quote
  #51  
Old 01-27-2011, 10:28 AM
Silver Member
 
Join Date: Jan 2010
Location: Western Pennsylvania
Posts: 200
Re: Case sorting???

I agree that there are differences from one lot to another as well as from one brand to another.
This thread has been debating sorting your cases by volume OR sorting by weight.
My point is that if you weight sort your brass and eliminate the outliers, then you should be able to keep a very consistent load regardless of the volume meaasurement because all of the remaining cases will be expanded to a near identical volume during the pressure event. The only variable concerning the case during the pressure event would be the thickness of the base and web and if you already weight sorted then you should have minimized that variable.

I agree that case wall thickness does make a difference in volume but that variable should have already been nearly eliminated by staying with the same brand/lot of brass.
I shoot several different brands of brass in my rifles and have found some have drastically different volumes whereas others are nearly identical. My 300 RUM loads are approx. 1.5gr different between nosler and remington brass, however my 25-06 loads stay identical in both remington and hornady/frontier brass with identical accuracy and identical velocity averages. Thus my conclusion is that the base/web construction of both in 25-06 is nearly identical and my weight sorting has eliminated the cases with a thicker/thinnner base/web than the average of the lot.
Over all, I just don't see how you can derive any true value from volume measurements of the case when the volume is going to change to chamber dimensions the instant you pull the trigger.
__________________
There's no time quite like trigger time! .................................................. .................................................. .................../\.
Reply With Quote
  #52  
Old 01-27-2011, 12:16 PM
Platinum Member
 
Join Date: Dec 2008
Location: Northern Id.
Posts: 3,356
Re: Case sorting???

Quote:
Originally Posted by Hookturnr View Post
I agree that there are differences from one lot to another as well as from one brand to another.
This thread has been debating sorting your cases by volume OR sorting by weight.
My point is that if you weight sort your brass and eliminate the outliers, then you should be able to keep a very consistent load regardless of the volume meaasurement because all of the remaining cases will be expanded to a near identical volume during the pressure event. The only variable concerning the case during the pressure event would be the thickness of the base and web and if you already weight sorted then you should have minimized that variable.

I agree that case wall thickness does make a difference in volume but that variable should have already been nearly eliminated by staying with the same brand/lot of brass.
I shoot several different brands of brass in my rifles and have found some have drastically different volumes whereas others are nearly identical. My 300 RUM loads are approx. 1.5gr different between nosler and remington brass, however my 25-06 loads stay identical in both remington and hornady/frontier brass with identical accuracy and identical velocity averages. Thus my conclusion is that the base/web construction of both in 25-06 is nearly identical and my weight sorting has eliminated the cases with a thicker/thinnner base/web than the average of the lot.
Over all, I just don't see how you can derive any true value from volume measurements of the case when the volume is going to change to chamber dimensions the instant you pull the trigger.
You would THINK that would be true, but the difference in wall thickness, etc. can, and does, make a difference. It is true that you eliminate a lot of the difference by weighing the same lot out, but if you volume measure as J.E. described, you will STILL find some of the cases with different volumes.
ALSO: I noticed in my previous post that I said weighing to be "consistent" and what I meant to say was "inconsistent" Sorry about that.....Rich
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Case sorting???
Thread Thread Starter Forum Replies Last Post
Bullet sorting for LR consistency? esshup Rifles, Bullets, Barrels and Ballistics 11 03-18-2011 09:17 PM
sinclair case neck sorting tool ks270 Reloading Equipment and Components 0 12-19-2010 09:24 AM
pressures and brass sorting 4LClover Reloading 2 12-01-2010 01:56 PM
Bullet Sorting Question Moman Reloading 10 10-15-2008 07:55 PM
velocity based case sorting milanuk Rifles, Bullets, Barrels and Ballistics 9 09-22-2004 12:48 PM

Current Poll
Do you archery hunt for elk?
YES - 30.94%
56 Votes
NO - 53.59%
97 Votes
Not yet, but I plan to. - 15.47%
28 Votes
Total Votes: 181
You may not vote on this poll.

All times are GMT -5. The time now is 05:13 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC