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.338 Edge newbie loading help!

 
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  #1  
Old 06-02-2013, 11:53 PM
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Join Date: Feb 2013
Location: AZ
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.338 Edge newbie loading help!

Hey all!

I first want to say to all who contribute, thank you! What an amazing sight! The knowledge and information on this sight blows me away! Thank you so much, I've learned a ton.

I recently recieved my .338 Edge and have been doing some load tests with the 300gr Berger. I'm pretty close, I feel, to finding the "sweet spot". It's somewhere between 3.950 and 3.975. Now, I know you maybe thinking that's hella long, but trust me, that's where it's at. About .020-.050 off the lands. I like it there due to the fact that 94.5gr of Retumbo isn't being compressed and I'm getting 2850fps. That's freaking sick! I love it!

My question is about loading a round with good accuracy for the detachable mag. I've shot the Bergers at interior mag length and they shot like crap! Didn't group at all. The load was compressed at 94.5gr and not at 93 5gr would that be the issue? OR should I try the SMK, given that it has a longer barring surface?

The mag will be a seekins with 3.900 exterior oal. The mags been on back order, don't ask! Sore subject. So I should be able to have an coal of 3.870/3.880.

Any thoughts?
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  #2  
Old 06-03-2013, 08:43 AM
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Re: .338 Edge newbie loading help!

When you shot the groups loaded at mag length did you have the mag loaded and installed?

Did you try shooting the mag length load by just single feeding them?

Sometimes rifles loose accuracy with the pressure of a loaded mag box pushing on the bolt. Hard to believe I know, but it has been proven before. Not saying this is your issue, but might be worth looking into.

Jeff
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Old 06-03-2013, 09:21 AM
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Re: .338 Edge newbie loading help!

Thanks for the response. I single fed them and got poor results, With the burger bullet, At mag length.
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Old 06-03-2013, 09:25 AM
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Re: .338 Edge newbie loading help!

Ok, when you say "didn't group at all" what distance and what was the actual group size?

Jeff
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Old 06-03-2013, 09:47 AM
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Re: .338 Edge newbie loading help!

I was shooting at 100yds. I didn't actually measure it. I was shooting a benchrest target, all five shots were in and around the circle. If I would guess I'd say it was about a 2 or 3 inch spread.

When I shot the 3.965 rounds, my group was .41, all 5 rounds.

I guess there could be other factors as well. Maybe the charge was too compressed. I'm not the most consistent shooter either. I appreciate your help Jeff. What else do you think I should try?
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  #6  
Old 06-03-2013, 09:54 AM
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Re: .338 Edge newbie loading help!

If you want to run mag length you may get better results with the 300 gr Sierra Matchkings. In 2 different 338 edge's they shot more accurate for me. I also have used them in 2 different accumark 338-378's runnning mag length with a huge jump and they shot incredible both rifles under 1/2 inch. Bergers are usually more picky than the sierra's
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  #7  
Old 06-03-2013, 09:55 AM
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Re: .338 Edge newbie loading help!

Quote:
Originally Posted by itscastle View Post
I guess there could be other factors as well. Maybe the charge was too compressed. I'm not the most consistent shooter either. I appreciate your help Jeff. What else do you think I should try?
Here is what I would do. I would change to H-1000. Start 88 gr and work up. It will leave more room in the case. I don't care for a compressed load. Next I would go to 3 shot groups for now. Barrel heat could be an issue and I see no reason to waste the barrel life. If you get a load under 1" I would take that load to 200 or 300 yards. The last EDGE I set up shot the same size or slightly smaller groups at 200 as it did at 100 with 300 Bergers.

How far off the lands are you with the mag box load? The last one I did it was shooting decent at -.115" off but was tighter at 200 with a -.065" load.

Jeff
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