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300 Tomahawk

 
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  #1  
Old 07-14-2003, 10:51 AM
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300 Tomahawk

What is the trim to length that you use for your Tomahawk brass? The new Sierra manual lists 2.840" for the RUM, do I use this same measurement? How far should I let it go before trimming? Most of mine now runs 2.850-2.855" It's been fired four or five times and it looks like it is about time to anneal the necks. Should I trim before or after annealing, or does it matter?
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Old 07-14-2003, 12:55 PM
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Re: 300 Tomahawk

Tim
Trim to length is 2.840
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  #3  
Old 07-17-2003, 10:02 PM
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Re: 300 Tomahawk

A couple of more questions if you don't mind. Have you noticed it doing better with 215 or 210 primers?

What's the most accurate powder you've tried?
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Old 07-17-2003, 10:35 PM
 
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Re: 300 Tomahawk

Tim--
I like the Federal 210M. I tried the 215 but it tended to give me 70-100 fps flucutuations in my extreme spread. I changed to the 210M's and now I'm getting single digit ES's. Then powder I started with was H870, but since it was discontinued, I changed to WC872. I didn't see a need to try anything else, as it was turning in 1/3 MOA groups out to 600 yds in load testing.
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Old 07-17-2003, 10:57 PM
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Re: 300 Tomahawk

Chris,

How hot was it when you were shooting those groups? I've been shooting WC872, in temps from 85-105. I'm wondering if it's temperature sensitivity might be causing some of my fliers.

I'll try the 210M's thanks.
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Old 07-17-2003, 11:30 PM
 
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Re: 300 Tomahawk

Tim--
I've only shot it up to about 80*F. I would think that if you kept your ammo at a stable temp, it wouldn't cause fliers. The primers were the sole cause of my fliers at long range. The 70-100 fps didn't show up at 100yds, but it started showing up at 600 and really shows at 800-1000. Good luck--if you still have problems, try some Retumbo--I know Boyd uses it...

[ 07-18-2003: Message edited by: Chris Jamison ]
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  #7  
Old 07-17-2003, 11:36 PM
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Re: 300 Tomahawk

Tim, Chris, this is a very timely thread!
I have a 300 RUM, Factory Savage.
Right now i am loading, ( trying to find The load )220 SMK, Retumbo, Fed 215m.
I have found wc872 at $3.oo lb plus haz-mat and shipping.
What is the starting powder charge for the RUM with 872?
One more thing, does anyone else have a problem trying to get the SMK's set at a consistant oal?
Any help here is greatly appreciated
John
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