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Rifles, Reloading, Optics, Equipment
Reloading
How did I get an extra 150fps? 300Wby
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<blockquote data-quote="backwoods83" data-source="post: 871299" data-attributes="member: 29890"><p>/\ the shape of the ogive means nothing pressure wise, in a 300 wby the bullet starts engraving at .300" no matter where or what shape it is when the bullet comes to that diameter. Also being closer to the lands with 2 identical bullets is not going to show more pressure with the same powder charge because that leaves more air space in the case and no more resistance on the bullet. Now if said bullet was jammed in the lands then yes it could be over pressured without reducing the charge weight due to a 4500 psi higher start pressure. You mention the hornady verses the accubond, since the accubond has about .125" longer bearing surface (162 amax vs 160 accubond) it creates much more pressure because of the amount of surface area that is being engraved by the rifling.</p></blockquote><p></p>
[QUOTE="backwoods83, post: 871299, member: 29890"] /\ the shape of the ogive means nothing pressure wise, in a 300 wby the bullet starts engraving at .300" no matter where or what shape it is when the bullet comes to that diameter. Also being closer to the lands with 2 identical bullets is not going to show more pressure with the same powder charge because that leaves more air space in the case and no more resistance on the bullet. Now if said bullet was jammed in the lands then yes it could be over pressured without reducing the charge weight due to a 4500 psi higher start pressure. You mention the hornady verses the accubond, since the accubond has about .125" longer bearing surface (162 amax vs 160 accubond) it creates much more pressure because of the amount of surface area that is being engraved by the rifling. [/QUOTE]
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How did I get an extra 150fps? 300Wby
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