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Load data for 180gr sst/ 308 or 30-06

 
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  #8  
Old 05-23-2013, 11:21 AM
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Join Date: Dec 2001
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Re: Load data for 180gr sst/ 308 or 30-06

Quote:
Originally Posted by Obadiah View Post
.308 with 1:9 twist
.30-06 with 1:10 twist
Used for targets.
I don't have the hornady manual for the load data. I came across a box of these and need a good target load for 500- 900 yards
I've tried both H-4350 and IMR-4064 in the 30-06 don't own a 308 but Hodgdon data should work for the 308. I read one of your earlier post about that bull you got with 30-06 made a good shot on him.

Nothing wrong with the Hornady manual but for the 30-06 but they tend to start at a lower velocity and amount of powder give you good example. for a start load using 180gr SST start load is 40.1g/IMR-4064 @ 2300fps and max is 49.2gr/IMR-4064 @ 2700fps and Hodgdon data for 180gr Sierra bullet start load 45.5gr/IMR-4064 @ 2550fps max 48.7gr @ 2700fps.

there is difference in test rifles

You use lot more bullet working up with Hornady data but they do list what rifle their using. Well good luck
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  #9  
Old 05-24-2013, 08:11 PM
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Join Date: Jan 2010
Posts: 17
Re: Load data for 180gr sst/ 308 or 30-06

Evening everyone,
Interesting Topic for the Forum.

I appreciated the comment by Bart B with regards too high RPM's influencing accuracy. I did a quick spreadsheet for twists, 9-10-11-12. Velocity range of 2300 to 2700 FPS. Interesting to me was that the difference in RPM's between a 9 twist and a 12 twist was approx. 46,000.
Trying to analize what I'am looking at, I reviewed Lyman's most accurate load for a 180 grain Ballistic tip bullet. It produces RPM data of 181,728 based on a 10 twist at 2524 FPS. My question is: When does RPM's and at what rate of spin come to influence a load.

Thanks for listening.
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