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Rifles, Reloading, Optics, Equipment
Reloading
308 Win and 185 Berger VLD load data.
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<blockquote data-quote="Bart B" data-source="post: 577346" data-attributes="member: 5302"><p>When .308's were the king of high power rifle competition, folks used 42 grains of IMR4064 under Berger's 185 VLD.</p><p></p><p>I watched an interesting comparison between Berger's 185 VLD and Sierra's 190 HPMK shot in the same barrel at identical muzzle velocities. Chronograph screens were placed 10 feet apart in front of the rifle and another pair at 997 yards down range in front of a 1000 yard target. Conventional chrono screens were at 15 feet but two aluminum foil coated 1/4th inch foam sheets spaced at 10 feet were down range and wired to the chrono in the pits. They measured the bullet's speed quite well.</p><p></p><p>Both bullets left about 2585 fps from the 26 inch barrel. Down range, the Berger was traveling about 60 fps slower than the Sierra which went through the down range screens at about 1320 fps. Makes one wonder just how "very low" drag the Berger had. Maybe the Sierra 190 HPMK should be called an "extremely low drag" bullet as it obviously had a higher BC than the Berger.</p></blockquote><p></p>
[QUOTE="Bart B, post: 577346, member: 5302"] When .308's were the king of high power rifle competition, folks used 42 grains of IMR4064 under Berger's 185 VLD. I watched an interesting comparison between Berger's 185 VLD and Sierra's 190 HPMK shot in the same barrel at identical muzzle velocities. Chronograph screens were placed 10 feet apart in front of the rifle and another pair at 997 yards down range in front of a 1000 yard target. Conventional chrono screens were at 15 feet but two aluminum foil coated 1/4th inch foam sheets spaced at 10 feet were down range and wired to the chrono in the pits. They measured the bullet's speed quite well. Both bullets left about 2585 fps from the 26 inch barrel. Down range, the Berger was traveling about 60 fps slower than the Sierra which went through the down range screens at about 1320 fps. Makes one wonder just how "very low" drag the Berger had. Maybe the Sierra 190 HPMK should be called an "extremely low drag" bullet as it obviously had a higher BC than the Berger. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
308 Win and 185 Berger VLD load data.
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