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Long Range Hunting & Shooting
Recommend a Brake--Seekins Havak
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<blockquote data-quote="Rich Coyle" data-source="post: 1965786" data-attributes="member: 70559"><p>It appears we are both speculating. I will go with the video. I used to do brake testing and had no bias. The results were what they were. Here is an example of one test.</p><p></p><p>12/6/14 60* </p><p>Brake with four angled slots at about 15 1/2 degree 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</strong> a brake:</p><p></p><p>14 7/8"</p><p></p><p>14 5/16"</p><p></p><p>14 5/16"</p><p></p><p>Average - 14 ½"</p><p></p><p><strong>With</strong> the brake installed so the ports angled <strong>toward the front</strong>:</p><p></p><p>4 5/8"</p><p></p><p>4 7/8"</p><p></p><p>4 7/8"</p><p></p><p>Average - 4 13/16"</p><p></p><p>reduction – 66.8%</p><p></p><p></p><p></p><p><strong>With</strong> the brake installed so the ports angled <strong>toward the rea</strong>r:</p><p></p><p>3"</p><p></p><p>3 ¼"</p><p></p><p>3 5/16"</p><p></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></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: 1965786, member: 70559"] It appears we are both speculating. I will go with the video. I used to do brake testing and had no bias. The results were what they were. Here is an example of one test. 12/6/14 60* Brake with four angled slots at about 15 1/2 degree 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[/B] a brake: 14 7/8” 14 5/16” 14 5/16” Average - 14 ½” [B]With[/B] the brake installed so the ports angled [B]toward the front[/B]: 4 5/8” 4 7/8” 4 7/8” Average - 4 13/16” reduction – 66.8% [B]With[/B] the brake installed so the ports angled [B]toward the rea[/B]r: 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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Recommend a Brake--Seekins Havak
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