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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Muzzle brakes...
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<blockquote data-quote="Rich Coyle" data-source="post: 1123809" data-attributes="member: 70559"><p>12/6/14 60* brake with four slots angled at about 15 1/2 degrees with threads thread on both ends.</p><p></p><p>Brakes <em>WORK</em><strong>!</strong> Over the years I made a few brakes to play with. Someone suggested I make one with angled slots threaded on both ends. Here are the data.</p><p></p><p>Today I used the Weatherby Mark V ultralight six lug action <strong>without</strong> the scope. It has a Pac-Nor 26" barrel. The rifle weighs <strong>5 lb 10oz</strong>. The load consisted of .270 Winchester cases necked down to .257 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 <strong>3,800 feet per second</strong>. I fired three shots with each setup to verify the free recoil travel information generated.</p><p></p><p>Without a brake: </p><p>14 7/8"</p><p>14 5/16"</p><p>14 5/16"</p><p>Average - <strong>14 ½</strong>"</p><p></p><p>With the brake installed so the ports angled toward the front: </p><p>4 5/8"</p><p>4 7/8"</p><p>4 7/8"</p><p>Average - <strong>4 13/16</strong>"</p><p>reduction – 66.8%</p><p></p><p>With the brake installed so the ports angled toward the rear:</p><p>3"</p><p>3 ¼"</p><p>3 5/16"</p><p>Average - <strong>3 3/16</strong>"</p><p>Reduction – 78%</p></blockquote><p></p>
[QUOTE="Rich Coyle, post: 1123809, member: 70559"] 12/6/14 60* brake with four slots angled at about 15 1/2 degrees with threads thread on both ends. Brakes [I]WORK[/I][B]![/B] Over the years I made a few brakes to play with. Someone suggested I make one with angled slots threaded on both ends. Here are the data. Today I used the Weatherby Mark V ultralight six lug action [B]without[/B] the scope. It has a Pac-Nor 26” barrel. The rifle weighs [B]5 lb 10oz[/B]. The load consisted of .270 Winchester cases necked down to .257 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 [B]3,800 feet per second[/B]. I fired three shots with each setup to verify the free recoil travel information generated. Without a brake: 14 7/8” 14 5/16” 14 5/16” Average - [B]14 ½[/B]” With the brake installed so the ports angled toward the front: 4 5/8” 4 7/8” 4 7/8” Average - [B]4 13/16[/B]” reduction – 66.8% With the brake installed so the ports angled toward the rear: 3” 3 ¼” 3 5/16” Average - [B]3 3/16[/B]” Reduction – 78% [/QUOTE]
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