Dents/Crimp on shoulder cause?

huntoregon

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Feb 23, 2014
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I am pretty inexperienced to reloading, have loaded for 300wm and .308 successfully but that is all.

That being said my father in law asked me to work up a load for a 6.5-06 he has. He gave me some once fired Winchester 25-06 brass and a set of RCBS FL 6.5-06 dies. I tumbled the brass and went to size it and got dents around the whole perimeter at the base of the shoulder. Can anyone tell me what might cause this?
 

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huntoregon

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I am pretty confident this is not from too much lube. I have seen that before, this is different in how it dented the whole circumference. Also after the first one I lubed the next two cases very lightly. Not sure if the vent hole could cause this much denting.
 

huntoregon

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Feb 23, 2014
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Just cleaned the die and made sure vent hole was free. Ran another piece of brass through with no lube at all and it had the same affect.
 

huntoregon

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I did forget to mention the die and the rifle are Ackley Improved. Would that have anything to do with this problem? Like I said I have never loaded for anything but basic stuff.
 

ctw

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Mar 23, 2015
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try not getting lube on the shoulder, lube on the shoulder will cause this. ctw
 

Edd

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Can you post a picture of a piece of brass before and after it is sized?
 

huntoregon

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Hopefully this helps. The first 4 are of a piece before and after sizing. The last one is a sized piece next to one that hasn’t been.
 

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huntoregon

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With this being an AI rifle, should I be expanding the neck to seat bullets and then fire forming before I full length size?

Or am I ok to just FL size right away?
 

Edd

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In the picture, the neck looks longer on the sized brass. Are you pushing the shoulder back too far?

What chamber were those once fired 25-06 cases fired in?
 

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