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Long Range Hunting & Shooting
7mm Rem Mag vs 6.5 Prc
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<blockquote data-quote="speedengineer" data-source="post: 1942088" data-attributes="member: 112986"><p>When I purchased rifle recently I too was trying to decided between 7mm rem mag and 6.5 PRC. I ended up going with the 6.5 PRC.</p><p></p><p>You mentioned the ability of the 7mm to shoot heavier bullets. This is true, but only kind of. Most of the 7mm factory rifles don't come with enough twist rate to stabilize the really heavy long-for-caliber bullets. Most of the 6.5 PRC factory offerings have 8 twist, or even 7 twist as my Browning does.</p><p></p><p>Just picking Berger for example, 8 twist 6.5 PRC can shoot 156gn EOL. But a 9.5 twist 7mm can't shoot the 195 EOL per per Berger's twist recommendation. It can shoot their 175gn though. The 156 has a slightly higher BC, and the 6.5 PRC will shoot it slightly faster velocity than the 7mm will shoot the 175 (I think, just based on looking up load data online, 2800fps vs 2750fps).</p><p></p><p>The 6.5 with 156 Berger will actually have every so slightly better ballistic performance than 7mm RM with the 175gn.</p><p>Kinetic energy at 500 yards and 10k feet elevation would be 1920 ft-lbf for the PRC, and 1969 ft-lbf for the 7mm.</p><p></p><p>[ATTACH=full]203715[/ATTACH]</p><p></p><p>*edited, reduced 6.5 PRC muzzle velocity with the 156 to 2800fps</p></blockquote><p></p>
[QUOTE="speedengineer, post: 1942088, member: 112986"] When I purchased rifle recently I too was trying to decided between 7mm rem mag and 6.5 PRC. I ended up going with the 6.5 PRC. You mentioned the ability of the 7mm to shoot heavier bullets. This is true, but only kind of. Most of the 7mm factory rifles don't come with enough twist rate to stabilize the really heavy long-for-caliber bullets. Most of the 6.5 PRC factory offerings have 8 twist, or even 7 twist as my Browning does. Just picking Berger for example, 8 twist 6.5 PRC can shoot 156gn EOL. But a 9.5 twist 7mm can't shoot the 195 EOL per per Berger's twist recommendation. It can shoot their 175gn though. The 156 has a slightly higher BC, and the 6.5 PRC will shoot it slightly faster velocity than the 7mm will shoot the 175 (I think, just based on looking up load data online, 2800fps vs 2750fps). The 6.5 with 156 Berger will actually have every so slightly better ballistic performance than 7mm RM with the 175gn. Kinetic energy at 500 yards and 10k feet elevation would be 1920 ft-lbf for the PRC, and 1969 ft-lbf for the 7mm. [ATTACH type="full" alt="7mm vs 6.5 PRC.png"]203715[/ATTACH] *edited, reduced 6.5 PRC muzzle velocity with the 156 to 2800fps [/QUOTE]
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7mm Rem Mag vs 6.5 Prc
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