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7mm Rem Accumark Load Testing

 
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  #8  
Old 03-13-2010, 10:25 PM
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Re: 7mm Rem Accumark Load Testing

Will do. I would have tried that but with this being a hunting rifle I didnt want a single shot and I dont want to deal with two different loads etc...... If it didnt like the bergers I would of just tried something else. Hopefully its a repeat performance next time. I appreciate the help!
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  #9  
Old 03-13-2010, 11:33 PM
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Re: 7mm Rem Accumark Load Testing

Quote:
Originally Posted by ovastafford View Post
It just seems odd that one load could shoot so good and .5gr later 5" group.
There is no way that a change of 0.5 grains of powder is going to do this in a 7mm Mag.

I would be looking to some other cause for such a large change in your group size.

Also why have a 7mm mag if you are going to shoot it at 280 Rem velocities.
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  #10  
Old 03-13-2010, 11:53 PM
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Re: 7mm Rem Accumark Load Testing

Im going to bump it up and find my max and see how it shoots there. Berger told me the max with retumbo was 70 grains so I figured that was a good place to start. Thanks for the input.
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  #11  
Old 03-14-2010, 12:14 AM
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Re: 7mm Rem Accumark Load Testing

Quote:
Originally Posted by Topshot View Post
There is no way that a change of 0.5 grains of powder is going to do this in a 7mm Mag.

I would be looking to some other cause for such a large change in your group size.

Also why have a 7mm mag if you are going to shoot it at 280 Rem velocities.
Never say never. It took 1.0 grain to open the group from 0.9" to 5.0". You show a steady progression of improvement, to deterioration, and then back to improvement in group sizes. Only way to know if these results are for real or not is to see if you can duplicate good groups at the apparent optimal powder charges. You may find your highest MV optimum charge around 74-75 grains. You may peak out on pressure before getting to 75.5.

Last edited by phorwath; 03-14-2010 at 04:03 AM.
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  #12  
Old 03-14-2010, 01:49 AM
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Re: 7mm Rem Accumark Load Testing

Another thing that is kinda bothering me is at 73.5 grs its pretty compressed... Im worried as I go higher im going to run into issues.
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  #13  
Old 03-14-2010, 02:12 AM
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Re: 7mm Rem Accumark Load Testing

My COAL is 3.456" and I have no problems at this bullet seating depth with 74.6 grains Retumbo.

You must have a typo in your first post. At 3.668" COAL the bullet would just about fall out of the case neck. I think you meant 3.368"? A little compressed powder probably won't hurt anything. But at that deeper seating depth you may have an overly compressed load. Since I'm not seating that deep, I don't know. See how it goes.

Loading single shot style for LRH really hasn't proven to be a handicap for me. I load Nosler Accubonds or Barnes TSXs for carrying in the magazine and closer range shots. When the animals out at 400 yds or farther, I load my long range VLD accuracy loads one at a time. The farther the animal is away, the more time you'll have to load single shot style without compromises.

Last edited by phorwath; 03-14-2010 at 04:06 AM.
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  #14  
Old 03-14-2010, 10:05 AM
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Re: 7mm Rem Accumark Load Testing

i would try again with WLRM primers; or cci 250
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