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338-378 weatherby brass issues

Jwebb75

338-378 weatherby brass issues
« on: February 27, 2018, 08:10:41 PM »
Hello Weatherby nation, I am new to the site but have been a weatherby fan for a long time, I have had a 338-378 Weatherby for 3 Years, I had bought some older brass that worked well, I hand loaded it maybe 5 Times, loaded them with 115grns of Retumbo with a 250gr SMK, they shot fine, no pressure issues, no flattened primers, nothing, shot awesome groups, I have now purchased 5 boxes of new brass and I loaded them with 111grns of Retumbo with the same 250gr SMK, they are swelling in my chamber and are leaving a ring above the belt. I canít even reload them as they donít chamber, has anyone else had this issue with weak brass
« Last Edit: February 27, 2018, 08:53:23 PM by Jwebb75 »

dubyam

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Re: 338-378 weatherby brass issues
« Reply #1 on: February 28, 2018, 06:24:35 AM »
Did you start 10% lower than max and work up again, or just decide o n the 111gr load and go? If 115 is the max in your original load, I'd be thinking about starting around 105gr and working up. You could have that much variation in powder or brass lots.

You could have soft brass, but what it sounds like is pressure, to me.
I believe this is a practical world, and in it I can count only on what I can earn.  Therefore I believe in work, hard work. - The Auburn Creed
The older I get, the less stock I place in what men say, and the more I place in what men do. - Andrew Carnegie

Jwebb75

Re: 338-378 weatherby brass issues
« Reply #2 on: February 28, 2018, 10:36:23 AM »
I started at 109grns with the older brass with no pressure signs, worked up to max load of 115grns and no pressure signs, bought new brass and started having issues
« Last Edit: February 28, 2018, 11:53:01 AM by Jwebb75 »

dubyam

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Re: 338-378 weatherby brass issues
« Reply #3 on: February 28, 2018, 10:37:37 AM »
What is laser brass?
I believe this is a practical world, and in it I can count only on what I can earn.  Therefore I believe in work, hard work. - The Auburn Creed
The older I get, the less stock I place in what men say, and the more I place in what men do. - Andrew Carnegie