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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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<blockquote data-quote="NATE40" data-source="post: 1130201" data-attributes="member: 33416"><p>In the situation you posted, the pressure would increase because your load showed pressure signs at at a longer seating depth and then you reduced your case capacity by seating deeper. That said if the COAL was changed to .015 your pressure would decrease and would keep decreasing until the bullet contacted the resistance of the lands and the pressure would increase due to resistance. </p><p> SAMMI OAL specs in factory ammunition and many reloading books are printed for deeper to accommodate all types of firearms old ,new,auto loaders ,magazine length and so on . The reason for seating longer is to increase powder capacity in a case for increased MV and reduced pressure It's commonly called caliber up. </p><p>A 30.06 shoots the same bullet as a 308 win but the case capacity is much larger increasing MV. There are limits in caliber upping and those start when the lands are touched and even brass thickness neck tension and so on but with work the safety,muzzle velocity and accuracy can be obtained with this method. Berger bullet website has really good reading on this subject</p></blockquote><p></p>
[QUOTE="NATE40, post: 1130201, member: 33416"] In the situation you posted, the pressure would increase because your load showed pressure signs at at a longer seating depth and then you reduced your case capacity by seating deeper. That said if the COAL was changed to .015 your pressure would decrease and would keep decreasing until the bullet contacted the resistance of the lands and the pressure would increase due to resistance. SAMMI OAL specs in factory ammunition and many reloading books are printed for deeper to accommodate all types of firearms old ,new,auto loaders ,magazine length and so on . The reason for seating longer is to increase powder capacity in a case for increased MV and reduced pressure It's commonly called caliber up. A 30.06 shoots the same bullet as a 308 win but the case capacity is much larger increasing MV. There are limits in caliber upping and those start when the lands are touched and even brass thickness neck tension and so on but with work the safety,muzzle velocity and accuracy can be obtained with this method. Berger bullet website has really good reading on this subject [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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