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Reloading Berger Bullets


338 edge brass reforming

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Unread 12-18-2010, 07:06 PM
Junior Member
Join Date: Nov 2009
Posts: 3
338 edge brass reforming

I am attempting to run 300 ultra mag brass (Nosler) through a redding 338 edge die to expand the necks from 308 to 338. I am getting case deformation due to the pressure required to force that case through that die. I am coating the inside of the necks with lube so that isnt the problem. Any suggestions?
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Unread 12-18-2010, 07:46 PM
Silver Member
Join Date: Jan 2009
Posts: 139
Re: 338 edge brass reforming

I have Shawn Carlock's modified die set and haven't had a problem. He uses a tapered redding expander to just open the neck without using the full stroke of the press handle.
You then changer the exapnder to a .30 cal expander and resize through the S bushed redding die.

The expander may possibly need a tapered version which just unscrews onto the priming rod if that makes sense.

Glad I went and bought Shawns straight up even if they cost a little more. I was going to do the same and just buy edge dies from redding

Brand new formed Edge cases without fire forming are whacking into in 1 inch with my new girl at 300 . I will hopefully get it down to 1/2 Moa at 300 from my Sendero taper Lawton tube and indicators are I will be able to that once I fine tune the load and length a bit more. Finding the sweet spot around 93gn in MY rifle.. 94 is showing promise with no real pressure signs.Every rifle is different though work up.. I have shots touching but there is some operator error still.

I have just had the firing pin bushed similar to a custom Lawton 7000 firing pin lets see what happens!
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Unread 12-18-2010, 08:29 PM
Silver Member
Join Date: Nov 2008
Location: Nelson, New Zealand
Posts: 349
Re: 338 edge brass reforming

You may find that the expander button isn't tapered/smooth enough.

I don't think the Redding one is designed to expand the necks that much.

I had a similar problem so I took the button out & made it more like a Hornady one, using a drill & grinder, then various grits of sandpaper to make it smooth.
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Unread 12-20-2010, 09:37 AM
TAP TAP is offline
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Join Date: Jan 2008
Location: Central Az.
Posts: 152
Re: 338 edge brass reforming

For me personally, I found the Nosler brass too soft. Was getting pressure signs way earlier than the Remmy brass I am using. Considerably more expensive, and the accuracy in my rifle wasn't any better.
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Unread 12-21-2010, 07:36 PM
Silver Member
Join Date: Nov 2006
Posts: 191
Re: 338 edge brass reforming

Use a tapered expander button. I havent had any issues while forming edge brass.
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