Re: Is this anything to be worried about?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wirehand</div><div class="ubbcode-body">Does not look bad the difference in the surfaces is the case head that has retained origanal size and the wall that expanded to the chamber.</div></div>Yes, this is normal and simply the point at which the thin case wall transitions to being very thick and joins the solid head.<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">The dreaded case head seperation will show a deffinate ring that is more acute to the junction of head and wall.
If you want take a small pick or a bent paper clip and slide it down the inside .
There will be a deffinate hang up or dip when arriving at a seperation. </div></div>True, and good advice, but a non-issue with factory loads in an SAAMI correct chamber.
Lonewolf83, when you set your sizing die adjustment, do not follow factory die instructions that tell you to screw it down until it touches the shellholder.
This will produce a cartridge case that is of minimum dimensions that should chamber in any standard rifle. Unless your rifle has a minimum chamber, this will lead to a cycle of excessive sizing and expansion upon firing that will cause premature case failure due to head separation.
Set your die to provide .002" shoulder bump, or, lacking the ability to measure this, simply set the die so that the resized case will barely enter the rifle chamber with no resistance. It may take a few firings to find this point, or a case from a rifle with a larger chamber to use as measuring tool.
