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25-06 case head seperation?

 
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  #8  
Old 02-18-2010, 01:26 PM
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Join Date: May 2008
Location: Ohio
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Re: 25-06 case head seperation?

Assuming your not exceeding manual guidelines, my first reaction is youre oversizing the brass each time, this will undoubtedly shorten case life, more then normal. FL sizing each time I will say that your case life wont be too good. (typically minimally sizing cases to fit your rifle’s chamber is what most do for bolt actions, for accuracy and case life).. If you have no choice but to FL size, make sure you know your max headspace dimension fo ryour rifle, so that you can minimize how much your sizing cases – another way that comes to mind is to get a body die, and a separate neck die, it may be easier to manipulate the case sizing with that setup. (bump shoulder no more then 2 thou.)
Next thing, if youre oversizing (during FL szg), chances are good you have too much headspace,.. this can and will contribute to case head separation.
Also, I would dbl check your break open action for any possible loosening, this may be a factor.
Next thing, if your seating bullets too far to the lands, this will cause pressure spikes, hence busted cases. If you know your rifle’s chamber dimensions (and case dims before and after firings), this would go a long way in understanding what the problem is.
Next, if you scratched your chamber, maybe a problem, may not be.. if it is a good gouge it could be a problem for your brass, otherwise it maybe possible to sand it out .
What loads are you using? Are you trimming cases every 2/3 reloads? When you say 5th, 6th rounds cracked, etc. , are you talking about “5th reload” or just 5th round fired that day?
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  #9  
Old 02-18-2010, 11:53 PM
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Re: 25-06 case head seperation?

I agree with not sizing any more than you have to for all the reasons mentioned. I started loading a 25 with a lee loader back in the early 70's and NEVER separated a case because it only neck sized. As long as I used my own brass, I could load countless times as long as I trimmed occasionally. Not suggesting you go to a Lee loader just don't overwork your cases. You'll probably have better accuracy as well.....Rich
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  #10  
Old 02-19-2010, 11:47 AM
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Join Date: Aug 2009
Location: Carlisle, PA
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Re: 25-06 case head seperation?

Quote:
Originally Posted by Moman View Post
Yote, here is the tool that I use for this. I measure and record case length at the datum prior to and after fire forming, recording results. It will give you an idea of the size of your chamber. I set my dies to partial size the shoulders about .001. If you use this tool, deprime first in a seperate operation, measure, then bump shoulder .001-.002.

Another suggestion, use a sharp pointed tool (sometimes even a paper clip will work) to feel the inside of your case in this area. You can usually feel this seperation start to form on the inside first.



Hornady Lock-N-Load Headspace Gage 5 Bushing Set with Comparator - MidwayUSA
+1 on the tool.

I use an RCBS universal deprime die to get the primers out.

I've found this tool to be excellent for detecting thinning just above the base:

MidwayUSA - Advanced Search

Setup just like it is in the picture it works really well to detect case thinning above the base. When I see it on the gage, I can see it looking in the case with a borescope.

Fitch
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  #11  
Old 02-22-2010, 02:08 AM
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Join Date: Apr 2009
Posts: 77
Re: 25-06 case head seperation?

Well i have LEE reloading dies and press. If i do not full length resize my cases everytime the cases would get stuck. I noticed this when i only neck sized for my H&R in .223. So i did not bother just neck sizing for my 25-06. I did noticed that when i did full length resized my cases for the 25-06 that the dies only sized to where the cases split. After the the stuck case i did gouge the chamber a bit and when i fired the next time i did noticed the brass conformed to the gouges in the chamber. I bought a nrck sier for the 25-06 but hav e not used it for that reason. So could i only neck size and bump shoulders back enough to prevent stucks cases?
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  #12  
Old 02-26-2010, 02:28 AM
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Join Date: Apr 2009
Posts: 77
Re: 25-06 case head seperation?

Well after everyone's input i compared once fired brass to the reloaded brass . Same brand brass(remington) from the same gun.The once fired brass was even all the way around looking down the inside of the brass.The stuff i reloaded was bulged uneven looking down inside brass? The cases that did crack also the same,uneven bulge. Also i compared side by side the once fired with the reloaded stuff and the shoulders were the same length. I turned them side by side and noticed the reloaded brass actually was leaning away from the once fired brass. Wow! Also used a paperclip bent to feel the inside of cases. Looked at chamber of the rifle and noticed a low spot in the chamber itself. The repair sanding i did after i removed the stuck was not enough to make a low spot in the chamber. Repaired slight gouges from removing stuck case.How do i know? The sanding marks are above the low spot in the chamber! Also looking down the chamber i noticed brass marks in the chamber were uneven from what i could see. As far as reloading i followed the recommened instructions that came with my LEE reloader for setting up the die for use. Also looked at brass again and noticed bulge just below where the case heads cracked after the first firing. Compared to the new factory loaded ammo.Could the chamber have been cut using a crooked tooling? The rifle in question is a H&R ultra Hunter.
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  #13  
Old 02-26-2010, 02:48 AM
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Join Date: Apr 2009
Posts: 77
Re: 25-06 case head seperation?

With what i just found out i will go to the source (rifle chamber) next time if this happens before i start blaming reloading equipment. I will be calling H&R tomorrow and find out if they will help me with this problem. So something new learned and hope this helps out someone else with the same problem. So before spending money on a gunsmith to look at your rifle take it take some time to check it yourself first. Remember we are all human and we do make mistakes. Without humans, machines would not know what to do!
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  #14  
Old 02-26-2010, 06:14 AM
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Join Date: Aug 2009
Location: Carlisle, PA
Posts: 478
Re: 25-06 case head seperation?

Interesting. Please post what H&R says after they inspect the chamber.

Thanks
Fitch
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