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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
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<blockquote data-quote="chas3stix" data-source="post: 552868" data-attributes="member: 34452"><p>I was visiting the Accurate Shooter site and came across info on the 30BR round.</p><p>The parent case is either 6mm or7mmBR. The case is necked up for 30 caliber bullets.</p><p>Here's the part I don't understand.....they're claiming 2900 to 3000 fps with the 30BR using33 Gr. of H- 4198 powder. For a comparable load with the 7mmBR, the maximum velocity is 2685 using 28.5Gr. of H-4198. (both rounds shooting a 115Gr.bullet). So how do they get the extra fps?</p><p>I'm no ballistician or math whiz....would appreciate someone out there to explain this to me.Thanks in advance.</p><p>Chas</p></blockquote><p></p>
[QUOTE="chas3stix, post: 552868, member: 34452"] I was visiting the Accurate Shooter site and came across info on the 30BR round. The parent case is either 6mm or7mmBR. The case is necked up for 30 caliber bullets. Here's the part I don't understand.....they're claiming 2900 to 3000 fps with the 30BR using33 Gr. of H- 4198 powder. For a comparable load with the 7mmBR, the maximum velocity is 2685 using 28.5Gr. of H-4198. (both rounds shooting a 115Gr.bullet). So how do they get the extra fps? I'm no ballistician or math whiz....would appreciate someone out there to explain this to me.Thanks in advance. Chas [/QUOTE]
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