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Long Range Hunting & Shooting
Improving the 308 Win performance
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<blockquote data-quote="nralifer" data-source="post: 2696186" data-attributes="member: 94556"><p>Maybe you should do the math. The G1BC of the 150 gr .308 BD2 bullet is 0.515. At 3050 fps, which I get all the time from my 24" 1:9 Bartlein using a SAAMI 308 chamber loaded to 2.980" to mag feed at 5000 ft elevation which is where a lot of Elk hunting is done, at 59degreesF 50% humidity and 1 ATM corrected to that altitude the bullet at 900 yds is going over 1800 fps and has 1080 ft# energy. The bullet expands at 1700 fps impact. A 150 gr copper Etip in a 3006 per listed data in the 2021 Hodgdon Annual Manual from a 24" barrel has a max listed MV of 2947 fps. The BC of that bullet is listed at G1=0.469 (see Noslers pic below). I did not propose this thread to argue the point of whether the 308Win is better or worse than anything else. I apologize if you are getting that impression. The purpose of the thread is to stimulate discussion on what modern components can improve the performance of the 308 Win with the idea that concepts developed along similar lines could do the same for other cartridges. In my mind there are quite a few things that can be done beyond just using a higher energy powder. I would like to see what other guys have done along those lines.</p></blockquote><p></p>
[QUOTE="nralifer, post: 2696186, member: 94556"] Maybe you should do the math. The G1BC of the 150 gr .308 BD2 bullet is 0.515. At 3050 fps, which I get all the time from my 24” 1:9 Bartlein using a SAAMI 308 chamber loaded to 2.980” to mag feed at 5000 ft elevation which is where a lot of Elk hunting is done, at 59degreesF 50% humidity and 1 ATM corrected to that altitude the bullet at 900 yds is going over 1800 fps and has 1080 ft# energy. The bullet expands at 1700 fps impact. A 150 gr copper Etip in a 3006 per listed data in the 2021 Hodgdon Annual Manual from a 24” barrel has a max listed MV of 2947 fps. The BC of that bullet is listed at G1=0.469 (see Noslers pic below). I did not propose this thread to argue the point of whether the 308Win is better or worse than anything else. I apologize if you are getting that impression. The purpose of the thread is to stimulate discussion on what modern components can improve the performance of the 308 Win with the idea that concepts developed along similar lines could do the same for other cartridges. In my mind there are quite a few things that can be done beyond just using a higher energy powder. I would like to see what other guys have done along those lines. [/QUOTE]
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