sorting brass by wieght vs capacity vs no sorting
- Thread starter hot range
- Start date
Without sorting by volume my ES was 12 to16
Sorting by H2o I get 5" or less . I have a tool I made that sets the volume off the shoulder no off the fill . Larry
I would be interested in hearing about that tool and how it works.
Hope to have it for sale soon . Larry
Like his post, the tool will be missing 90% of the parts needed to complete the job 
Larry, if this works I may actually start paying more attention to your posts!
It works I can do the same cases and never very .1 10 times . Right now they are caliber specific . Close to getting to where one can do two or more caliber .
They don't do total capacity . Closer to usable case capicity. Larry
90% sure I will make sure You will be one of the last to find out . Smile. LarryLike his post, the tool will be missing 90% of the parts needed to complete the job
Seems there's an article on this board featuring one of the top flight F-class guys and his shooting methods. He states he doesn't sort brass at all.
There was an article written some time ago in Handloader magazine done on this very subject. The author admitted that the results will make a lot of people unhappy.....He showed no statistical advantage to sorting brass. Us handloaders who are in it for accuracy find that a tough pill to swallow.....we like to add complexity to our processes that is simply not needed.
Well it seems to help with my little bit of experience. But maybe it's just boosting my confidence but if thats what it takes to give me confidence then I'm gonna do it. But I started this article to see what other people's test results were.
Here is what I found out about my 243Win hunting rifle regarding brass brand, weight, volume and velocity.
http://forum.accurateshooter.com/threads/243win-brass-brands-weights-and-velocities.3895683/
http://forum.accurateshooter.com/threads/243win-brass-brands-weights-and-velocities.3895683/
Given identical exterior dimensions for all cases the difference in internal volume is directly proportional to the difference in weight. Brass specific gravity is approximately 7.5 times the SpGv of double based powders and approximately 8 times the SpGv of single based powders in the cartridges I have tested. I made the tests long ago when I went through my search for 1 caliber hole groups. I never succeeded but found a lot of things that actually improved my group sizes. I found that within the ranges that I used my gun the differences in case volume were more or less meaningless with the exception of military brass in my 3006. Those cases were enough smaller to cause a difference in point of impact that was consistently distant from other cartridges to be significant.
That means it takes 8 grains of brass to make the same volume of one grain of powder.
If you think plus or minus one grain of powder is significant then plus or minus 8 grains of case weight should also be significant.
If you think plus or minus one grain of powder is significant then plus or minus 8 grains of case weight should also be significant.
Yes! that is exactly right. It becomes less significant if the case weight difference is one grain or less. That would make the volume of powder about .125 which is significant if you are shooting long range but if you are hunting and have a load that is at the mid-point of the Optimum Charge Weight you can usually go +/- 0.5 grains without moving the point of impact noticeably at "normal" hunting ranges.
Now the volume for powder is less significant in a bottle-neck case than it is in a straight case so it might only become critical if you were loading very near maximum charges.
Basically it becomes a ratio of available space compared to the space that the added powder would take up or the space lost with the reduction in volume. That changes dramatically when you start filling the case toward its limit. Under hunting conditions it is almost a negligible difference and will make less difference than the ballistic changes that occur with the added 4-5000 feet of altitude.
Just read your thread, super interesting! Nice looking Euro rifle too!
This has been done in the past and from what I remember the velocity per case was not found to be reproducible. I.e. It wasn't the case contributing to the velocity variation
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.