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Rifles, Reloading, Optics, Equipment
Reloading
How did I get an extra 150fps? 300Wby
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<blockquote data-quote="Bart B" data-source="post: 866156" data-attributes="member: 5302"><p>If your barrel's bore and groove diameters were smaller than what was used to get the load data and you held the rifle differently, too, that extra muzzle velocity is normal. The use of different primers and powder lots as well as firing pin impact force, case neck tension than what the load reference used compounds the issue.</p><p></p><p>It's not abnormal to shoot a given load's bullet 200 fps faster or slower than what some published load says. All sorts of variables that are not listed for comparisons.</p></blockquote><p></p>
[QUOTE="Bart B, post: 866156, member: 5302"] If your barrel's bore and groove diameters were smaller than what was used to get the load data and you held the rifle differently, too, that extra muzzle velocity is normal. The use of different primers and powder lots as well as firing pin impact force, case neck tension than what the load reference used compounds the issue. It's not abnormal to shoot a given load's bullet 200 fps faster or slower than what some published load says. All sorts of variables that are not listed for comparisons. [/QUOTE]
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How did I get an extra 150fps? 300Wby
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