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Need 7mm RUM load data!

 
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  #1  
Old 06-16-2011, 09:10 PM
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Location: SW Montana
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Need 7mm RUM load data!

So I picked up a 7mmRUM barrel from another member and I'm looking for some data. I stopped and picked up some brass and dies also picked up some 175 Sierra Gamekings. Any do's or don't tips would be good also.
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  #2  
Old 06-18-2011, 02:41 AM
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Re: Need 7mm RUM load data!

This seems to be a very finicky caliber. I recently built a 7 RUM and after alot of trial and error I settled on the 190 matrix bullet, 86 grains of Retumbo, nosler custom 300 RUM brass necked down and federal 215 primers. I started with Remington brass but found that after 2-3 loadings, I had difficulty getting the bolt to open. This was remedied with the nosler brass. I also tried cci 250 primers however I ended up with alot of hang fires! Bad deal. Remedied with federal 215s. I tried h1000, rl25 and 50 bmg powder but found my most consistent and most accurate loads with Retumbo. I also loaded the 180 bergers with 88 grains of Retumbo to about 3250 fps and very accurate but settled with the 190 matrix at 3150. I want to try some h 869 powder next. I hope this helps you a little bit
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  #3  
Old 06-19-2011, 08:11 AM
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Join Date: Mar 2010
Location: Eastern Washington
Posts: 205
Re: Need 7mm RUM load data!

Uh oh, BnG must be getting bored waiting for your barrel to get back if you are playing with a "7mm". I dont have anything intelligent to add I just wanted to jab you a little. Im in the same boat I have found myself a little bored as of late so I am in the infant stages of designing my own wildcat with the help of sin arms. I would really bet that you are going to find your best all around performance with the 160-168 grain class bullets. Atleast that is what I have found playing with all my 7mm's.

Good luck, Jason
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  #4  
Old 06-19-2011, 10:00 AM
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Location: SW Montana
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Re: Need 7mm RUM load data!

Jason,

Ya, waiting for a barrel is much easier on us Savage guys since we can have a back up to run while waiting ever so patiently! I feel like I've done all kinds of evil getting a 7mm, I'll have to sneak out to the range so no one see's me with it, you wouldn't believe the ration of crap I've gotten from my shooting buddy I plan on using it to play with the heavier bullets and piles of Retumbo to see if I want to get a tweaked up reamer made, I have an idea brewing Tweaking stuff is so addictive I hope I never recover from it but winning the lottery would help!!!
Good luck with your wildcat!!
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  #5  
Old 06-19-2011, 10:04 AM
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Re: Need 7mm RUM load data!

Quote:
Originally Posted by sledder1 View Post
This seems to be a very finicky caliber. I recently built a 7 RUM and after alot of trial and error I settled on the 190 matrix bullet, 86 grains of Retumbo, nosler custom 300 RUM brass necked down and federal 215 primers. I started with Remington brass but found that after 2-3 loadings, I had difficulty getting the bolt to open. This was remedied with the nosler brass. I also tried cci 250 primers however I ended up with alot of hang fires! Bad deal. Remedied with federal 215s. I tried h1000, rl25 and 50 bmg powder but found my most consistent and most accurate loads with Retumbo. I also loaded the 180 bergers with 88 grains of Retumbo to about 3250 fps and very accurate but settled with the 190 matrix at 3150. I want to try some h 869 powder next. I hope this helps you a little bit
Thanks, that helps. All the feed back I've gotten on the 7RUM seems to point to Retumbo and Fed 215's which I load a lot of anyway so that's good.
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  #6  
Old 06-19-2011, 09:16 PM
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Re: Need 7mm RUM load data!

Lit it up this evening and results were encouraging, loaded 3 of 88gr of Retumbo and then 89, 90, 91, 91.5 and 92gr of one each to get a feel for the top end with a 175 GameKing. The velocities ran from 3012 to 3204. Shot 1 didn't land on target so got it lined up better and shots 2-5 went under 1/2 inch at 100 then it moved around a little but still OK, really need to get a Muscle Brake installed to take some of the push out of it as my shoulder didn't like moving that much Over all I'm finding it interesting!
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High Fence, Low Fence, Stuck in the Fence, if I can Tag it and Eat it, it's Hunting!

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  #7  
Old 06-19-2011, 09:27 PM
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Location: Eastern Washington
Posts: 205
Re: Need 7mm RUM load data!

So what are the specs on this rig. What is the length ect...?

Jason
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