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30-378 caselife?

 
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Old 02-16-2005, 10:25 PM
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Join Date: Feb 2005
Posts: 3
30-378 caselife?

I'm running a Sako trg chambered in 30-378 and was wondering how long these cases last. My load has been 122gr of h-870 for the last 500rds.[100rd lot] These cases have only been neck sized except once when I full lengthed them and trimmed. I am not new to reloading but I am new to the 30-378 with the freebore. This brass shows no sighns of presure and I've only had 1 neck split early on. How long do you guys think this brass should last?
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Old 04-05-2005, 09:41 PM
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Join Date: Dec 2001
Location: Pennsylvania
Posts: 230
Re: 30-378 caselife?

Hi,
I did about the same as you 4 firings neck sizing only, full lengthed the fifth with a standard rcbs die. Back to neck sizing now. Starting to lose some from primer pockets. As I'm priming cases the very easy to prime brass gets a magic marker across the head, meaning.... Last Fire.

I'm about to take one case, back the load down a hair, reload, full length resizing it, checking for thinning ahead of the web, repeat until I see something I don't like. I just lost a whole pile of 5 times fired/ last 3 times FL sized match 300 Wby brass due to case head sep/thin. I thought full length sizing every time would be more consistent, well maybe if I set the dang thing up right.

That said my 30-378 cases have lived longer than my 300 Wby and I'm a bit harder on them too. But it is my own fault and not the brasses.

I couldn't see it by eye after the 2nd FLS but I have since measured some and they were 5-7 thousandths thinner just in front of the web. Now with a noticeable shiny line they are 15 thou thinner just in front of the web.

I also switched to a slightly faster powder for the last 2 firings....from RL25 to RL22. Similar vel, no marks. You think that could that be part of the problem?
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