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Rifles, Reloading, Optics, Equipment
Reloading
excess pressure?
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<blockquote data-quote="Mikecr" data-source="post: 612097" data-attributes="member: 1521"><p>A lot of things combine to produce different pressures with a given load.</p><p>OgvOAL matters in that pressure step changes upward as a bullet contacts the rifling lands.</p><p>Bullet seating depth matters in that deeper seating increases load density a small amount, but in an extreme can compress a load. Also an extreme is seating to put bullet bearing into the neck-shoulder junction, where tension(bullet grip) sharply increases.</p><p></p><p>These are not always 'problems'. Many develop great loads with bullets jammed into lands, or seated deeply due to magazine restrictions.</p><p>But they can cause your pressures/velocities to differ from book listed.</p><p>Many other things can as well.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 612097, member: 1521"] A lot of things combine to produce different pressures with a given load. OgvOAL matters in that pressure step changes upward as a bullet contacts the rifling lands. Bullet seating depth matters in that deeper seating increases load density a small amount, but in an extreme can compress a load. Also an extreme is seating to put bullet bearing into the neck-shoulder junction, where tension(bullet grip) sharply increases. These are not always 'problems'. Many develop great loads with bullets jammed into lands, or seated deeply due to magazine restrictions. But they can cause your pressures/velocities to differ from book listed. Many other things can as well. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
excess pressure?
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