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Rifles, Reloading, Optics, Equipment
Reloading
7 PRC
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<blockquote data-quote="entoptics" data-source="post: 2689218" data-attributes="member: 104268"><p>I suggest trying a different powder if you are consistently getting slower results from the 7 PRC than the 7 SAUM. The PRC is a considerably more potent cartridge according to all published load data I can access freely on the internet. It has 4 grains (5%) more case capacity after all.</p><p></p><p>Here's a direct comparison of Nosler's load data for the 7 SAUM vs Hodgdon's load data for the 7 PRC. With identical powders, bullets, and barrel lengths, the PRC outruns the SAUM by over 100 fps, and when optimized, over 200 fps.</p><p></p><table style='width: 100%'><tr><td><strong>Cartridge</strong></td><td><strong>Powder</strong></td><td><strong>Charge</strong></td><td><strong>Velocity</strong></td><td><strong>FPS/Gr</strong></td><td><strong>FPS Difference</strong></td></tr><tr><td>7 PRC</td><td>H1000</td><td><div style="text-align: right">67.2</div> </td><td><div style="text-align: right">2968</div> </td><td><div style="text-align: right">44.2</div> </td><td></td></tr><tr><td>7 SAUM</td><td>H1000</td><td><div style="text-align: right">61.5</div> </td><td><div style="text-align: right">2836</div> </td><td><div style="text-align: right">46.1</div> </td><td><div style="text-align: right">132</div> </td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>7 PRC</td><td>Retumbo</td><td><div style="text-align: right">70.0</div> </td><td><div style="text-align: right">2985</div> </td><td><div style="text-align: right">42.6</div> </td><td></td></tr><tr><td>7 SAUM</td><td>Retumbo</td><td><div style="text-align: right">63.5</div> </td><td><div style="text-align: right">2879</div> </td><td><div style="text-align: right">45.3</div> </td><td><div style="text-align: right">106</div> </td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>7 PRC</td><td>Magnum</td><td><div style="text-align: right">70.4</div> </td><td><div style="text-align: right">2946</div> </td><td><div style="text-align: right">41.8</div> </td><td></td></tr><tr><td>7 SAUM</td><td>Magnum</td><td><div style="text-align: right">65.0</div> </td><td><div style="text-align: right">2832</div> </td><td><div style="text-align: right">43.6</div> </td><td><div style="text-align: right">114</div> </td></tr><tr><td><em>Max Published Load</em></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>7 PRC</td><td>LRT</td><td><div style="text-align: right">79</div> </td><td><div style="text-align: right">3106</div> </td><td><div style="text-align: right">39.3</div> </td><td></td></tr><tr><td>7 SAUM</td><td>RL22</td><td><div style="text-align: right">59</div> </td><td><div style="text-align: right">2882</div> </td><td><div style="text-align: right">48.8</div> </td><td><div style="text-align: right">224</div> </td></tr></table><p></p><p>I understand that individual rifles vary, but even if one compared the slowest 7 PRC barrel to the fastest 7 SAUM barrel, it is unlikely that the 7 SAUM would ever outrun the 7 PRC with properly developed hand loads.</p><p></p><p>Based on published data (and physics), there are only two "common" cartridges that match or exceed the 7 PRC, while staying within reason of SAAMI specs. 28 Nosler and 7 Rem Mag.</p></blockquote><p></p>
[QUOTE="entoptics, post: 2689218, member: 104268"] I suggest trying a different powder if you are consistently getting slower results from the 7 PRC than the 7 SAUM. The PRC is a considerably more potent cartridge according to all published load data I can access freely on the internet. It has 4 grains (5%) more case capacity after all. Here's a direct comparison of Nosler's load data for the 7 SAUM vs Hodgdon's load data for the 7 PRC. With identical powders, bullets, and barrel lengths, the PRC outruns the SAUM by over 100 fps, and when optimized, over 200 fps. [B][/B] [TABLE] [TR] [TD][B]Cartridge[/B][/TD] [TD][B]Powder[/B][/TD] [TD][B]Charge[/B][/TD] [TD][B]Velocity[/B][/TD] [TD][B]FPS/Gr[/B][/TD] [TD][B]FPS Difference[/B][/TD] [/TR] [TR] [TD]7 PRC[/TD] [TD]H1000[/TD] [TD][RIGHT]67.2[/RIGHT][/TD] [TD][RIGHT]2968[/RIGHT][/TD] [TD][RIGHT]44.2[/RIGHT][/TD] [TD][/TD] [/TR] [TR] [TD]7 SAUM[/TD] [TD]H1000[/TD] [TD][RIGHT]61.5[/RIGHT][/TD] [TD][RIGHT]2836[/RIGHT][/TD] [TD][RIGHT]46.1[/RIGHT][/TD] [TD][RIGHT]132[/RIGHT][/TD] [/TR] [TR] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]7 PRC[/TD] [TD]Retumbo[/TD] [TD][RIGHT]70.0[/RIGHT][/TD] [TD][RIGHT]2985[/RIGHT][/TD] [TD][RIGHT]42.6[/RIGHT][/TD] [TD][/TD] [/TR] [TR] [TD]7 SAUM[/TD] [TD]Retumbo[/TD] [TD][RIGHT]63.5[/RIGHT][/TD] [TD][RIGHT]2879[/RIGHT][/TD] [TD][RIGHT]45.3[/RIGHT][/TD] [TD][RIGHT]106[/RIGHT][/TD] [/TR] [TR] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]7 PRC[/TD] [TD]Magnum[/TD] [TD][RIGHT]70.4[/RIGHT][/TD] [TD][RIGHT]2946[/RIGHT][/TD] [TD][RIGHT]41.8[/RIGHT][/TD] [TD][/TD] [/TR] [TR] [TD]7 SAUM[/TD] [TD]Magnum[/TD] [TD][RIGHT]65.0[/RIGHT][/TD] [TD][RIGHT]2832[/RIGHT][/TD] [TD][RIGHT]43.6[/RIGHT][/TD] [TD][RIGHT]114[/RIGHT][/TD] [/TR] [TR] [TD][I]Max Published Load[/I][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]7 PRC[/TD] [TD]LRT[/TD] [TD][RIGHT]79[/RIGHT][/TD] [TD][RIGHT]3106[/RIGHT][/TD] [TD][RIGHT]39.3[/RIGHT][/TD] [TD][/TD] [/TR] [TR] [TD]7 SAUM[/TD] [TD]RL22[/TD] [TD][RIGHT]59[/RIGHT][/TD] [TD][RIGHT]2882[/RIGHT][/TD] [TD][RIGHT]48.8[/RIGHT][/TD] [TD][RIGHT]224[/RIGHT][/TD] [/TR] [/TABLE] I understand that individual rifles vary, but even if one compared the slowest 7 PRC barrel to the fastest 7 SAUM barrel, it is unlikely that the 7 SAUM would ever outrun the 7 PRC with properly developed hand loads. Based on published data (and physics), there are only two "common" cartridges that match or exceed the 7 PRC, while staying within reason of SAAMI specs. 28 Nosler and 7 Rem Mag. [/QUOTE]
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