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300 Grain Bergers

 
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  #22  
Old 05-16-2010, 05:19 PM
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Re: 300 Grain Bergers

Just shot the 92.5 gr loads. At 300 they were .5 moa high and at 500 they were still 1/2 moa high. The migage is still killer but the wind has settled a bit. As you can see they are showing promise. I had one I pulled but the other 4 look good. The load is a bit hot for 5 degrees and sunny. I may back it off for the next group I think it would be happy at 91.5 gr. Then I need to play with seating depth. For the 500 yard group I simply left the velocity the same and plugged in the .891 bc. It called for 4.75 moa. If you take off the .5 moa it was high at 300 zero it would be pretty close at 500 using that BC.

More Later....

Jeff

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  #23  
Old 05-16-2010, 07:45 PM
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Re: 300 Grain Bergers

very nice. showing a lot of promise
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  #24  
Old 05-16-2010, 08:55 PM
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Re: 300 Grain Bergers

Done for today. Backed the powder off to 91.5 gr and all was happy again. Waited for the mirage to die and checked zero at 300




Then shot at the 1000 yard target and it fell short by about 13" Adjusted up 1.5 moa and shot 3 using 3/4 left for spin drift. I went to look and decided to quit with this one for today. Rather be lucky that good!!








I feel there is still work on my load to do but for sure the accuracy of these bullets is there.

Jeff
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  #25  
Old 05-16-2010, 11:54 PM
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Re: 300 Grain Bergers

wow very nice, i think i would quit after that as well, thanks for posting and keep us updated, did you say what for gun you were shooting?
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  #26  
Old 05-17-2010, 12:05 AM
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Re: 300 Grain Bergers

Thanks, Broz. Great shooting. How much more precision could a guy ask for. You'll get the drops down, I'm sure, but in the meantime those groups look might good. And, with so many variables left to play with yet...
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  #27  
Old 05-17-2010, 08:07 AM
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Re: 300 Grain Bergers

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Originally Posted by sniperjwt View Post
wow very nice, i think i would quit after that as well, thanks for posting and keep us updated, did you say what for gun you were shooting?
The rifle is a custom 338 Lapua that Joe Starnes built me a couple years ago. It is on a SS Mark V action with a 27 1/2" Lilja 10 twist #8 Contour. In a McMillan A-5. It has a Near base I fitted to 43 MOA and a 8~32x56 Nightforce.

Jeff
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  #28  
Old 05-17-2010, 08:12 AM
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Re: 300 Grain Bergers

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Originally Posted by jmden View Post
Thanks, Broz. Great shooting. How much more precision could a guy ask for. You'll get the drops down, I'm sure, but in the meantime those groups look might good. And, with so many variables left to play with yet...
Yep I need to work with this load a bit. One other shooter on a different forum says they like to be closer to the lands, like .010". I was plugging in the numbers last night and to make that come up work with .891 BC I had to drop the MV down to 2720. I don't think that is right. So I need to do some chrony testing too.

It will be interesting as more data comes in on thse bullets. I am anxious to see what others here think.

Jeff
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