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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.270 vs 6.5x55
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<blockquote data-quote="Varberger757" data-source="post: 1609152" data-attributes="member: 66992"><p>You can't override the physics ... simple as that. Living in Norway, European regulations due to CIP - data are both decisive for me and European manufacturers! That means max. pressure of 3800 bar or 55114 psi for the 6,5x55 SE. There is no free space for "extraordinary chamberings" or other fantasy products. The 6,5x55 SE is taking 57gr H20 max, and this <strong>will not</strong> change. It's a limited volume, and there are no "flat trajectories" to be achieved with modern heavy and long secant projectiles like the 143gr. ELD - X. When seated correctly they are reducing the achievable powder volume! To hit a target at 800 meters distance you have to fire with an elevation of almost 9 meters (vertex) when using 143gr ELD - X and 21' bbl. Velocity is getting so reduced at 800 m that the wind may even "blow away" those high BC - bullets. The 6,5x55 SE is a nice cartridge, but not capable of miracles.</p></blockquote><p></p>
[QUOTE="Varberger757, post: 1609152, member: 66992"] You can't override the physics ... simple as that. Living in Norway, European regulations due to CIP - data are both decisive for me and European manufacturers! That means max. pressure of 3800 bar or 55114 psi for the 6,5x55 SE. There is no free space for "extraordinary chamberings" or other fantasy products. The 6,5x55 SE is taking 57gr H20 max, and this [B]will not[/B] change. It's a limited volume, and there are no "flat trajectories" to be achieved with modern heavy and long secant projectiles like the 143gr. ELD - X. When seated correctly they are reducing the achievable powder volume! To hit a target at 800 meters distance you have to fire with an elevation of almost 9 meters (vertex) when using 143gr ELD - X and 21' bbl. Velocity is getting so reduced at 800 m that the wind may even "blow away" those high BC - bullets. The 6,5x55 SE is a nice cartridge, but not capable of miracles. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.270 vs 6.5x55
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