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Muzzle brakes...
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<blockquote data-quote="Rich Coyle" data-source="post: 1971619" data-attributes="member: 70559"><p>I thought I posted this before, but can't find it. But then I don't seem to be able to make "search" work. The text explains the same brake forward and reverse ports.</p><p></p><p></p><p>12/6/14 60* brake with four angled slots at about 15 1/2degree threaded on both ends</p><p></p><p>Today I used the Weatherby Mark V ultralight six lug action without the scope. It has a Pac-Nor 26" barrel. The rifle weighs 5 lb 10oz. The load consisted of .270 Winchester cases necked down and blown out leaving about 3/16" neck. H4831 from WW2 @ 65.0 grains was ignited by a Federal 215 Magnum primer. The average velocity for the eighty-five grain G.S.Custom bullets was slightly over 3,800 feet per second. I fired three shots with each setup to verify the free recoil travel information generated.</p><p></p><p><strong>Without a brake</strong>:</p><p></p><p>14 7/8"</p><p>14 5/16"</p><p>14 5/16"</p><p>Average - 14 ½"</p><p></p><p>With the brake installed so the ports <strong>angled toward the front:</strong></p><p></p><p>4 5/8"</p><p>4 7/8"</p><p>4 7/8"</p><p>Average - 4 13/16"</p><p></p><p>reduction – 66.8%</p><p></p><p></p><p>With the brake installed so the ports <strong>angled toward the rear</strong>:</p><p></p><p>3"</p><p>3 ¼"</p><p>3 5/16"</p><p>Average - 3 3/16"</p><p></p><p>Reduction – 78%</p><p></p><p>Reduction - 51% better than angled forward</p><p></p><p>I have no idea how these numbers would compare to a free hanging rifle with a way to record its travel. But at least we can see a pattern developing.</p></blockquote><p></p>
[QUOTE="Rich Coyle, post: 1971619, member: 70559"] I thought I posted this before, but can't find it. But then I don't seem to be able to make "search" work. The text explains the same brake forward and reverse ports. 12/6/14 60* brake with four angled slots at about 15 1/2degree threaded on both ends Today I used the Weatherby Mark V ultralight six lug action without the scope. It has a Pac-Nor 26” barrel. The rifle weighs 5 lb 10oz. The load consisted of .270 Winchester cases necked down and blown out leaving about 3/16” neck. H4831 from WW2 @ 65.0 grains was ignited by a Federal 215 Magnum primer. The average velocity for the eighty-five grain G.S.Custom bullets was slightly over 3,800 feet per second. I fired three shots with each setup to verify the free recoil travel information generated. [B]Without a brake[/B]: 14 7/8” 14 5/16” 14 5/16” Average - 14 ½” With the brake installed so the ports [B]angled toward the front:[/B] 4 5/8” 4 7/8” 4 7/8” Average - 4 13/16” reduction – 66.8% With the brake installed so the ports [B]angled toward the rear[/B]: 3” 3 ¼” 3 5/16” Average - 3 3/16” Reduction – 78% Reduction - 51% better than angled forward I have no idea how these numbers would compare to a free hanging rifle with a way to record its travel. But at least we can see a pattern developing. [/QUOTE]
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