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Reloading Berger Bullets


Resizing brass from 308 t0 260??

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Unread 11-08-2012, 10:32 AM
Platinum Member
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 4,187
Re: Resizing brass from 308 t0 260??

Riley's concern seems the most probable culprit. When brass is downsized, it gets thicker. Your new necks as loaded could be too thick for the chamber neck, interfering with bullet release.
Maybe, maybe not, but:

That you didn't check this before letting your son fire the ammo, disqualifies you as a competent reloader, and certainly from father of the year in 2012..

Have a gunsmith look over your action ring and barrel/barrel nut for potential damage.
Buy 260 ammo, or at least use 260 reloading brass, until reviewing/understanding basic reloading.
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Unread 11-08-2012, 12:16 PM
Platinum Member
Join Date: May 2012
Posts: 4,242
Re: Resizing brass from 308 t0 260??

If you don't have at least a .001" clearance, the neck can't expand enough to let the bullet out easily; you were most likely at zero clearance here. That combined with an untested load NOT AT START OR 10% DOWN and the bullet resting on the lands caused your trouble. Get a little more fear of what you are doing or buy your rounds. BTW, have your gun re-built fully before you try to shoot it again.
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Unread 11-08-2012, 02:14 PM
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Join Date: Nov 2010
Location: Colorado
Posts: 108
Re: Resizing brass from 308 t0 260??

Thank you all so much for your input in my mistake here.... It is greatly appreciated!

Had the rifle checked out by a gunsmith before I posted on here last night. Everything is fine.


As for fear.... I have a great respect and fear for what I am doing when weapons are concerned. I have carried and used weapons my whole professional life.
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Unread 11-08-2012, 03:31 PM
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Join Date: Feb 2010
Posts: 18
Re: Resizing brass from 308 t0 260??

I do agree that thick necks could well be part of this. The other thing is according to the Nosler manual you were .5 Gr below max except you used a Win primer instead of the Remington that is recommended. In my experience with two different 260's that can make a big difference. The Remington tends to be a milder primer, while the winchester is hotter.

So far as necking down calibers your process is fine-- you just have to monitor neck thickness. Winchester 7/08 used to be my go to case for 260. Now I just pay the price for the Lapuas. They do last a long time.

Good hunting.
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