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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
257 weatherby no freebore
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<blockquote data-quote="RT2506" data-source="post: 599494" data-attributes="member: 10178"><p>The long free bore in a standard Weatherby chamber is to allow you to get those higher velocities without raising the pressure too much. Remove that longer free bore and you will not be able to get those higher velocities because you will have too much pressure. A buddy of mine found this out after the expense of having a rifle built in 257 WM throated to use bullets as long as a 120 gr Nosler Partition having the base of the bullet be even with the neck shoulder junction in the case. He could duplicate the velocities with a 25-06AI with less powder and better brass ( Lapua) and not having to fool with the belted case. Speed is one thing for flat trajectories but bullet weight pays off for long range with windage and terminal effect. Unless it is a mono-metal, bonded or partition bullet you don't want to use it on game where you might get close in shots with those high velocities. Been there and done that with the 264 win mag. Just some observations from life experiences. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="RT2506, post: 599494, member: 10178"] The long free bore in a standard Weatherby chamber is to allow you to get those higher velocities without raising the pressure too much. Remove that longer free bore and you will not be able to get those higher velocities because you will have too much pressure. A buddy of mine found this out after the expense of having a rifle built in 257 WM throated to use bullets as long as a 120 gr Nosler Partition having the base of the bullet be even with the neck shoulder junction in the case. He could duplicate the velocities with a 25-06AI with less powder and better brass ( Lapua) and not having to fool with the belted case. Speed is one thing for flat trajectories but bullet weight pays off for long range with windage and terminal effect. Unless it is a mono-metal, bonded or partition bullet you don't want to use it on game where you might get close in shots with those high velocities. Been there and done that with the 264 win mag. Just some observations from life experiences. :) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
257 weatherby no freebore
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