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Rifles, Reloading, Optics, Equipment
Reloading
Chamber pressures
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<blockquote data-quote="boomtube" data-source="post: 749761" data-attributes="member: 9215"><p>Conventional "wisdom" aside, seating deeper with rifles has been known to produce lower peak pressures since at least the 1930s when it was documented to do so in arsenal tests of that period, at least until the seating is about 1/4" below the common military seating depth for .30-06. And, as Hornady has illustrated since at least 1980, we can count on it to some degee in virtually anything.</p><p> </p><p>In fact, so far as I have been able to learn, seating deeper has little effect on peak pressure in any cartridges except the very few tiny internal volume-high pressure-fast powder-minimum leade pistol rounds like the 9 and .40/10 mm autoloader cases when using moderately heavy to heavy for caliber bullets.</p></blockquote><p></p>
[QUOTE="boomtube, post: 749761, member: 9215"] Conventional "wisdom" aside, seating deeper with rifles has been known to produce lower peak pressures since at least the 1930s when it was documented to do so in arsenal tests of that period, at least until the seating is about 1/4" below the common military seating depth for .30-06. And, as Hornady has illustrated since at least 1980, we can count on it to some degee in virtually anything. In fact, so far as I have been able to learn, seating deeper has little effect on peak pressure in any cartridges except the very few tiny internal volume-high pressure-fast powder-minimum leade pistol rounds like the 9 and .40/10 mm autoloader cases when using moderately heavy to heavy for caliber bullets. [/QUOTE]
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