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Rifles, Reloading, Optics, Equipment
Gunsmithing
Lug setback? What am I missing?
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<blockquote data-quote="bigngreen" data-source="post: 1826268" data-attributes="member: 13632"><p>Bolt thrust is pressure and area. Recoil is the momentum of the bullet and powder going down the barrel vs the resistance to that which is the weight of the gun, pressure has no bearing, you can have a low pressure round like a 45-70 destroy you or a high pressure round like a 6Br barely move the gun.</p><p>The fact that we see more recoil with a 230 gr bullet vs a 150 in a 300 RUM is because of the mass of the projectile and we all know if you drop a 230 bullet on a 150 gr bullet load you'll likely be rethinking your decisions in life. The effect of the heavier bullet is in the pressure part of the thrust calculation, it's accounted for and the load reduced to stay at the same given pressure as the lighter bullet load and this give you the same bolt thrust for each bullet because you have kept the same pressure and area for each load.</p></blockquote><p></p>
[QUOTE="bigngreen, post: 1826268, member: 13632"] Bolt thrust is pressure and area. Recoil is the momentum of the bullet and powder going down the barrel vs the resistance to that which is the weight of the gun, pressure has no bearing, you can have a low pressure round like a 45-70 destroy you or a high pressure round like a 6Br barely move the gun. The fact that we see more recoil with a 230 gr bullet vs a 150 in a 300 RUM is because of the mass of the projectile and we all know if you drop a 230 bullet on a 150 gr bullet load you'll likely be rethinking your decisions in life. The effect of the heavier bullet is in the pressure part of the thrust calculation, it's accounted for and the load reduced to stay at the same given pressure as the lighter bullet load and this give you the same bolt thrust for each bullet because you have kept the same pressure and area for each load. [/QUOTE]
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Lug setback? What am I missing?
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