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Long Range Hunting & Shooting
1000 yds...Next step?
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<blockquote data-quote="Bart B" data-source="post: 659242" data-attributes="member: 5302"><p>Shooting great groups or scores at 1000 yards with bullets in the 147 to 155 grain weight from a .308 Win.'s been done for decades around the world. But one needs a barrel long enough to get at least 2950 fps with them else they may go subsonic before reaching 1000 yards.</p><p></p><p>Great Britian's full bore as well as the USA Palma match competitors have been doing this with Sierra 155's since the early 1990's. And the Brits and their commonwealth country's long range competitors have been doing it for several decades with their arsenal's 147 grain bullet. Ballistic coefficient's not nearly as important as accuracy anyway. Top level competitors will pick ammo that's 20% more accurate than stuff that drifts 20% less. They can correct for the wind as it changes, but they can't correct for accuracy.</p><p></p><p>Sierra and Berger both make light weight bullets that'll shoot under 7 inches all day long from properly done full length sizing; neck only sizing's not all that great. Even the benchresters started moving away from neck only sizing years ago. Brand spankin' new cases can shoot 7 inches at 1000 yards; believe it or not.</p><p></p><p>Sierra's 30 caliber 168 HPMK's never done well in the .308 for long range. You'll need to shoot them out at 2800 fps to stay supersonic through 1000 yards. That won't happen with your 24 inch barrel. The US military learned that shortly after introducing 7.62 NATO match ammo with that bullet in the 1980's which is why they replaced that bullet with 175's. Sierra's 175's have a better shaped boattail for long range use than their 168 which was originally intended for use at 300 meters.</p><p></p><p>Your rifle's got a 1:10 twist in its 24-inch barrel. The best bullet for long range accuracy in it is probably Sierra's 200 grain HPMK. It's twist is a bit too fast for lighter bullets if best accuracy's the objective. Handload 48 grains of IMR4350 under that bullet and it'll probably knock your socks off. Second choice would be Sierra's 190 grain HPMK with 41 grains of IMR4064 under it. Use Wolff standard primers in the case of your choice but you may want to start a few grains under then work up.</p></blockquote><p></p>
[QUOTE="Bart B, post: 659242, member: 5302"] Shooting great groups or scores at 1000 yards with bullets in the 147 to 155 grain weight from a .308 Win.'s been done for decades around the world. But one needs a barrel long enough to get at least 2950 fps with them else they may go subsonic before reaching 1000 yards. Great Britian's full bore as well as the USA Palma match competitors have been doing this with Sierra 155's since the early 1990's. And the Brits and their commonwealth country's long range competitors have been doing it for several decades with their arsenal's 147 grain bullet. Ballistic coefficient's not nearly as important as accuracy anyway. Top level competitors will pick ammo that's 20% more accurate than stuff that drifts 20% less. They can correct for the wind as it changes, but they can't correct for accuracy. Sierra and Berger both make light weight bullets that'll shoot under 7 inches all day long from properly done full length sizing; neck only sizing's not all that great. Even the benchresters started moving away from neck only sizing years ago. Brand spankin' new cases can shoot 7 inches at 1000 yards; believe it or not. Sierra's 30 caliber 168 HPMK's never done well in the .308 for long range. You'll need to shoot them out at 2800 fps to stay supersonic through 1000 yards. That won't happen with your 24 inch barrel. The US military learned that shortly after introducing 7.62 NATO match ammo with that bullet in the 1980's which is why they replaced that bullet with 175's. Sierra's 175's have a better shaped boattail for long range use than their 168 which was originally intended for use at 300 meters. Your rifle's got a 1:10 twist in its 24-inch barrel. The best bullet for long range accuracy in it is probably Sierra's 200 grain HPMK. It's twist is a bit too fast for lighter bullets if best accuracy's the objective. Handload 48 grains of IMR4350 under that bullet and it'll probably knock your socks off. Second choice would be Sierra's 190 grain HPMK with 41 grains of IMR4064 under it. Use Wolff standard primers in the case of your choice but you may want to start a few grains under then work up. [/QUOTE]
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