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need 338-378 with 300gr matchking data

 
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  #1  
Old 11-14-2006, 06:36 PM
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Join Date: Oct 2006
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need 338-378 with 300gr matchking data

I need starting data for 300gr matchkings in a 338-378, please specify factory or custom chamber.

Thanks, Brad
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  #2  
Old 11-16-2006, 07:55 PM
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Join Date: Jan 2006
Location: Nebraska
Posts: 507
Re: need 338-378 with 300gr matchking data

http://www.hodgdon.com/data/rifle/3878wea.php
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Sierra starting loads for 300gr SMK
IMR 7828 87.0gr
H-1000 90.5gr
RE-25 90.0
H870 98.5
AA8700 98.5

S.A.M.I chambers
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  #3  
Old 11-17-2006, 07:24 AM
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Join Date: Dec 2003
Location: Wi
Posts: 81
Re: need 338-378 with 300gr matchking data

Mine has a minimum sammi chamber and I can reach the lands at 3.90 col, RE-25 shot ok but could not get the speed I was looking for. US869 at 115 grains runs 3000 from a 34 inch barrel and no pressure signs. I did try WC872 and was at 115 grains also but speed was less then the US869 and I needed a summer and winter load with the difference being 2 grains.
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  #4  
Old 11-18-2006, 07:27 AM
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Join Date: Oct 2006
Posts: 718
Re: need 338-378 with 300gr matchking data

Thanks I have RL 25 and 7828 so I loaded 10 of each and will give them a try. I am glad they started selling the 300's in smaller batches so you can try them for less than $100. Thanks
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  #5  
Old 11-19-2006, 12:08 PM
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Join Date: Nov 2004
Posts: 878
Re: need 338-378 with 300gr matchking data

AA-8700 98.5 grains - 110.0 grains
H-870 98.5 grains - 109.0 grains
H-1000 90.5 grains - 98.0 grains
H-4831 84.0 grains - 90.0 grains
IMR-7828 87.0 grains - 93.0 grains
Retumbo 100.0 grains - 106.5 grains
RL-25 90.0 grains - 99.0 grains
US-869 108.0 grains - 115.0 grains
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