Thread: .308 vs .30-06
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Old November 16, 2012, 02:44 PM   #47
Brian Pfleuger
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Join Date: June 25, 2008
Location: Central, Southern NY, USA
Posts: 18,612
CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.

I was surprised to see that the trend in the QuickLoad predictions was that the .308 was actually getting CLOSER to the .30-06 as the bullets got heavier so I went ahead and also ran the numbers for Hornady 220gr RN:


.308- Best noncompressed load, RL17, 44.9, 2,492fps, 108% compressed load, Ramshot Hunter 47.9gr, 2,498fps
.30-06- Best noncompressed load, Ramshot HUnter 56.9gr, 2,585fps, 108% compressed load, N560, 60.0gr, 2,654fps

Even here, where we've heard that the .30-06 "walks away" from the .308, we have only 150fps difference and only 93fps without going compressed. Any given difference between two guns/barrels/chambers could make up for that difference.
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