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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Weatherby 338-378 grouping issues
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 502309" data-attributes="member: 505"><p>My best load with the 225 grain bullet in a 338-378 wby with a 28" Hart barrel is 128 grains of H-870 at 3440 fps. This is a 225 accubond. Since you can't get H-870 any more try Retumbo. Powders faster than that will get max pressure before you hit top velocity. I wouldn't go faster than H-1000. The 338-378 is better with bullets over 200 grains. The 225 Barnes may not open well on little whitetails. The accubonds may be better for that purpose. My brother got a nice mule deer at 650 yards hunting with me last year shooting the 225 ttsx out of his 338-300 RUM I built for him. The 225 performed very well on that deer so it may work but that would be way less velocity than the 338-378 shooting close range smaller whitetails.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 502309, member: 505"] My best load with the 225 grain bullet in a 338-378 wby with a 28" Hart barrel is 128 grains of H-870 at 3440 fps. This is a 225 accubond. Since you can't get H-870 any more try Retumbo. Powders faster than that will get max pressure before you hit top velocity. I wouldn't go faster than H-1000. The 338-378 is better with bullets over 200 grains. The 225 Barnes may not open well on little whitetails. The accubonds may be better for that purpose. My brother got a nice mule deer at 650 yards hunting with me last year shooting the 225 ttsx out of his 338-300 RUM I built for him. The 225 performed very well on that deer so it may work but that would be way less velocity than the 338-378 shooting close range smaller whitetails. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Weatherby 338-378 grouping issues
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