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load workup for 300 RUM...

 
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  #36  
Old 06-28-2011, 12:06 PM
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Re: load workup for 300 RUM...

Quote:
Originally Posted by venom600 View Post
All loads were 3.62" COAL, using Remington 9 1/2M primers, with F/L sized brass.
Try Fed215M primers and I bet you get better results.

On your COAL, are you jumping or jamming?
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  #37  
Old 06-28-2011, 05:54 PM
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Re: load workup for 300 RUM...

Quote:
Originally Posted by trebark View Post
Try Fed215M primers and I bet you get better results.

On your COAL, are you jumping or jamming?
I haven't found any Fed 215M primers available for sale for quite some time. Do you know where to find them?! Do you really think they'll make that big of a difference, though?

I'm definitely jumping. The Max COAL on my (long throated) Sendero is 3.83, but 3.62 is as big as I can load them and still fit in the mag box.

--Ben
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  #38  
Old 06-28-2011, 07:52 PM
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Re: load workup for 300 RUM...

Quote:
Originally Posted by venom600 View Post
I haven't found any Fed 215M primers available for sale for quite some time. Do you know where to find them?! Do you really think they'll make that big of a difference, though?

I'm definitely jumping. The Max COAL on my (long throated) Sendero is 3.83, but 3.62 is as big as I can load them and still fit in the mag box.

--Ben
Primers can make a ton of difference. Third Generation has Fed215M in stock...

FED LARGE RIFLE MAGNUM MATCH 1000 PRIMERS

You're jumping your bullets .020. That's a pretty long way. Do you really have to fit in the mag? Generally when longrange hunting, single loading is not a problem. I find that .010 or .005 generally works better.
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Last edited by trebark; 06-28-2011 at 07:57 PM.
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  #39  
Old 06-28-2011, 08:06 PM
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Re: load workup for 300 RUM...

The Rem 9 1/2 primer is a decent primer, but the match primers like the F215M and and even the Winchester primers are more consistant.

WIN LARGE RIFLE MAGNUM 1000 PRIMERS

Remember that if you go the route of changing your primer, you have to start you load development all over. I was amazed in the difference velocities in my 300RUM when I changed from F215M (match) and their F215 (not match) primer.
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  #40  
Old 06-29-2011, 01:10 AM
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Re: load workup for 300 RUM...

Quote:
Originally Posted by trebark View Post
You're jumping your bullets .020. That's a pretty long way. Do you really have to fit in the mag? Generally when longrange hunting, single loading is not a problem. I find that .010 or .005 generally works better.
I'm actually jumping them .210, and you're right, that is a long way typically. Maybe it matters for these cutting edge bullets, but it definitely hasn't mattered for the Barnes LRXs that I've been shooting at the same COAL.

I guess it's worth trying to push them out farther, but ideally that means a different bullet all together with the CE bullets, since they suggest putting their "seal tite band" right at the case mouth.

I'd really like to be able to use my mag box, if possible, but I realize that's not an absolute requirement. If long bullets become my new reality, I could always have a Wyatt's extended box fitted.

--Ben
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