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Can't explain 6.5 Wby PLEASE Help

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  #1  
Unread 04-08-2013, 01:19 PM
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Join Date: Aug 2010
Location: Reno Nevada
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Can't explain 6.5 Wby PLEASE Help

This has to be the strangest problem I have ever had reloading.
Last year I built a 6.5 Wby. (257 WBY necked up yo 6.5)
The load developement went as you would expect, the Wby case liking loads on the warm side. It is shooting 140 bergers @ 3350 fps into less than a half inch at 100 yds.
I put the rifle away for hunting season, and picked it up recently to do some more loading and took it out to the range with some of the handloads I had from last year.
This is where it got interesting. The exact loads I was using last year are blowing the primers out now... Thinking I loaded too much powder I went back to my notes, no this is the load that shot well in my developement. Checked the powder, out of the same bottle, checked seating depth, same as last years, same primers too.
Obviously I have to go back to the drawing board and start over with my load developement.
My next move is to start with some fresh cases, and give the rifle a thorough cleading.
Got any ideas why this is happed???? Or what to do?
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  •   #2  
    Unread 04-08-2013, 02:22 PM
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    Re: Can't explain 6.5 Wby PLEASE Help

    sounds to me like the load is temp sensitive, did you work up the load when cool and is now warmer? That will do it if you were close to max. What powder were you using, if it was the Reloader powders I would expect this to be the problem, or switching primers from standard to magnum will certainly cause problems.
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      #3  
    Unread 04-08-2013, 02:37 PM
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    Re: Can't explain 6.5 Wby PLEASE Help

    I agree however I shot the loads in warmer temps before an I'm using h1000 which is not very temp sensitive
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      #4  
    Unread 04-08-2013, 04:48 PM
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    Re: Can't explain 6.5 Wby PLEASE Help

    I have the exact same round except with an improved 35* and i load 142 smk with about 70gr h1000 im at 3250fps

    Might just be a hot load... Not sure why the change but 3350 is cookin
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      #5  
    Unread 04-08-2013, 04:54 PM
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    Re: Can't explain 6.5 Wby PLEASE Help

    I'll just back it down and see what happens, what brass are you having the best luck?
    I've also put in 50 thousands of free bore to help alleviate pressure.
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      #6  
    Unread 04-08-2013, 05:10 PM
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    Re: Can't explain 6.5 Wby PLEASE Help

    Im 15/20 thou off... Norma brass.. Im on 4 reloads and going strong. You tried any Retumbo?
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      #7  
    Unread 04-08-2013, 05:40 PM
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    Re: Can't explain 6.5 Wby PLEASE Help

    H1000 and vit 560 seemed to work the best
    I have a lot of retumbo did it work for you?
    If so how much?
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