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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Results: Cutting a 7mm-08 Barrel From 26" to 20"
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<blockquote data-quote="Another Casual" data-source="post: 2525086" data-attributes="member: 89878"><p>In my opinion, there's not enough threads with data from cutting down barrels! </p><p></p><p>I cut down my 26" 7mm-08 barrel to 20". I tested 7 loads before and after and wanted to share the data. Bullets and powders were picked based on what I have on hand. ***Disclaimer, all loads were max in my rifle and should not be attempted*** </p><p></p><p>Why 20"? I figured it would be a good balance between too long to hunt with the can and too short to be tolerable from a noise perspective. </p><p></p><table style='width: 100%'><tr><td></td><td><strong><span style="font-size: 12px">Speer 130gr</span></strong></td><td><strong><span style="font-size: 12px">50.2g H4350</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td><td><strong><span style="font-size: 12px">Speer 145</span></strong></td><td><strong><span style="font-size: 12px">48.0g H4350</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td><td><strong><span style="font-size: 12px">Interlock 139</span></strong></td><td><strong><span style="font-size: 12px">48.0g H4350</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td><td><strong><span style="font-size: 12px">162 ELD-M</span></strong></td><td><strong><span style="font-size: 12px">45.0g H4350</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td><td><strong><span style="font-size: 12px">150 SPFB </span></strong></td><td><strong><span style="font-size: 12px">45.9g IMR4451</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td><td><strong><span style="font-size: 12px">162 ELD-M</span></strong></td><td><strong><span style="font-size: 12px">45.1g IMR4451</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td><td><strong><span style="font-size: 12px">162 ELD-M</span></strong></td><td><strong><span style="font-size: 12px">46.0g IMR4831</span></strong></td><td><strong><span style="font-size: 12px">Lost</span></strong></td></tr><tr><td></td><td>26"</td><td>20"</td><td></td><td>26"</td><td>20"</td><td></td><td>26"</td><td>20"</td><td></td><td>26"</td><td>20"</td><td></td><td>26"</td><td>20"</td><td></td><td>26"</td><td>20"</td><td></td><td>26"</td><td>20"</td><td></td></tr><tr><td><strong>1</strong></td><td>3126</td><td>2993</td><td></td><td>2986</td><td>2865</td><td></td><td>2972</td><td>2855</td><td></td><td>2730</td><td>2649</td><td></td><td>2765</td><td>2705</td><td></td><td>2710</td><td>2622</td><td></td><td>2660</td><td>2587</td><td></td></tr><tr><td><strong>2</strong></td><td>3108</td><td>2995</td><td></td><td>2980</td><td>2870</td><td></td><td>2974</td><td>2847</td><td></td><td>2717</td><td>2653</td><td></td><td>2820</td><td>2677</td><td></td><td>2688</td><td>2610</td><td></td><td>2660</td><td>2595</td><td></td></tr><tr><td><strong>3</strong></td><td>3126</td><td>2990</td><td></td><td>2980</td><td>2871</td><td></td><td>2982</td><td>2858</td><td></td><td>2723</td><td>2658</td><td></td><td>2772</td><td>2684</td><td></td><td>2731</td><td>2594</td><td></td><td>2648</td><td>2584</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><strong>AVG</strong></td><td>3120</td><td>2993</td><td>127</td><td>2982</td><td>2869</td><td>113</td><td>2976</td><td>2853</td><td>123</td><td>2723</td><td>2653</td><td>70</td><td>2786</td><td>2689</td><td>97</td><td>2710</td><td>2609</td><td>101</td><td>2656</td><td>2589</td><td>67</td></tr><tr><td><strong>SD</strong></td><td>10</td><td>3</td><td></td><td>3</td><td>3</td><td></td><td>5</td><td>6</td><td></td><td>7</td><td>5</td><td></td><td>30</td><td>15</td><td></td><td>22</td><td>14</td><td></td><td>7</td><td>6</td><td></td></tr><tr><td><strong>ES</strong></td><td>18</td><td>5</td><td></td><td>6</td><td>6</td><td></td><td>10</td><td>11</td><td></td><td>13</td><td>9</td><td></td><td>55</td><td>28</td><td></td><td>43</td><td>28</td><td></td><td>12</td><td>11</td><td></td></tr></table><p></p><p>Average Lost: 100 FPS</p><p>Average per Inch: 16.63 FPS</p><p></p><p>Sadly my rifle prefers much lower charge weights than the max, but the FPS lost per inch was less than I expected. The difference in velocity won't be missed as the rifle is much more enjoyable to shoot with a silencer on it now and the speeds are still quite good. In many cases the choice in powder will have a larger impact on the velocity than having cut down the barrel. I still need to pick up some of the more traditional 7mm-08 powders to try, once supply improves.</p></blockquote><p></p>
[QUOTE="Another Casual, post: 2525086, member: 89878"] In my opinion, there's not enough threads with data from cutting down barrels! I cut down my 26" 7mm-08 barrel to 20". I tested 7 loads before and after and wanted to share the data. Bullets and powders were picked based on what I have on hand. ***Disclaimer, all loads were max in my rifle and should not be attempted*** Why 20"? I figured it would be a good balance between too long to hunt with the can and too short to be tolerable from a noise perspective. [TABLE] [TR] [TD][/TD] [TD][B][SIZE=3]Speer 130gr[/SIZE][/B][/TD] [TD][B][SIZE=3]50.2g H4350[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [TD][B][SIZE=3]Speer 145[/SIZE][/B][/TD] [TD][B][SIZE=3]48.0g H4350[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [TD][B][SIZE=3]Interlock 139[/SIZE][/B][/TD] [TD][B][SIZE=3]48.0g H4350[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [TD][B][SIZE=3]162 ELD-M[/SIZE][/B][/TD] [TD][B][SIZE=3]45.0g H4350[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [TD][B][SIZE=3]150 SPFB [/SIZE][/B][/TD] [TD][B][SIZE=3]45.9g IMR4451[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [TD][B][SIZE=3]162 ELD-M[/SIZE][/B][/TD] [TD][B][SIZE=3]45.1g IMR4451[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [TD][B][SIZE=3]162 ELD-M[/SIZE][/B][/TD] [TD][B][SIZE=3]46.0g IMR4831[/SIZE][/B][/TD] [TD][B][SIZE=3]Lost[/SIZE][/B][/TD] [/TR] [TR] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [TD]26"[/TD] [TD]20"[/TD] [TD][/TD] [/TR] [TR] [TD][B]1[/B][/TD] [TD]3126[/TD] [TD]2993[/TD] [TD][/TD] [TD]2986[/TD] [TD]2865[/TD] [TD][/TD] [TD]2972[/TD] [TD]2855[/TD] [TD][/TD] [TD]2730[/TD] [TD]2649[/TD] [TD][/TD] [TD]2765[/TD] [TD]2705[/TD] [TD][/TD] [TD]2710[/TD] [TD]2622[/TD] [TD][/TD] [TD]2660[/TD] [TD]2587[/TD] [TD][/TD] [/TR] [TR] [TD][B]2[/B][/TD] [TD]3108[/TD] [TD]2995[/TD] [TD][/TD] [TD]2980[/TD] [TD]2870[/TD] [TD][/TD] [TD]2974[/TD] [TD]2847[/TD] [TD][/TD] [TD]2717[/TD] [TD]2653[/TD] [TD][/TD] [TD]2820[/TD] [TD]2677[/TD] [TD][/TD] [TD]2688[/TD] [TD]2610[/TD] [TD][/TD] [TD]2660[/TD] [TD]2595[/TD] [TD][/TD] [/TR] [TR] [TD][B]3[/B][/TD] [TD]3126[/TD] [TD]2990[/TD] [TD][/TD] [TD]2980[/TD] [TD]2871[/TD] [TD][/TD] [TD]2982[/TD] [TD]2858[/TD] [TD][/TD] [TD]2723[/TD] [TD]2658[/TD] [TD][/TD] [TD]2772[/TD] [TD]2684[/TD] [TD][/TD] [TD]2731[/TD] [TD]2594[/TD] [TD][/TD] [TD]2648[/TD] [TD]2584[/TD] [TD][/TD] [/TR] [TR] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD][B]AVG[/B][/TD] [TD]3120[/TD] [TD]2993[/TD] [TD]127[/TD] [TD]2982[/TD] [TD]2869[/TD] [TD]113[/TD] [TD]2976[/TD] [TD]2853[/TD] [TD]123[/TD] [TD]2723[/TD] [TD]2653[/TD] [TD]70[/TD] [TD]2786[/TD] [TD]2689[/TD] [TD]97[/TD] [TD]2710[/TD] [TD]2609[/TD] [TD]101[/TD] [TD]2656[/TD] [TD]2589[/TD] [TD]67[/TD] [/TR] [TR] [TD][B]SD[/B][/TD] [TD]10[/TD] [TD]3[/TD] [TD][/TD] [TD]3[/TD] [TD]3[/TD] [TD][/TD] [TD]5[/TD] [TD]6[/TD] [TD][/TD] [TD]7[/TD] [TD]5[/TD] [TD][/TD] [TD]30[/TD] [TD]15[/TD] [TD][/TD] [TD]22[/TD] [TD]14[/TD] [TD][/TD] [TD]7[/TD] [TD]6[/TD] [TD][/TD] [/TR] [TR] [TD][B]ES[/B][/TD] [TD]18[/TD] [TD]5[/TD] [TD][/TD] [TD]6[/TD] [TD]6[/TD] [TD][/TD] [TD]10[/TD] [TD]11[/TD] [TD][/TD] [TD]13[/TD] [TD]9[/TD] [TD][/TD] [TD]55[/TD] [TD]28[/TD] [TD][/TD] [TD]43[/TD] [TD]28[/TD] [TD][/TD] [TD]12[/TD] [TD]11[/TD] [TD][/TD] [/TR] [/TABLE] Average Lost: 100 FPS Average per Inch: 16.63 FPS Sadly my rifle prefers much lower charge weights than the max, but the FPS lost per inch was less than I expected. The difference in velocity won't be missed as the rifle is much more enjoyable to shoot with a silencer on it now and the speeds are still quite good. In many cases the choice in powder will have a larger impact on the velocity than having cut down the barrel. I still need to pick up some of the more traditional 7mm-08 powders to try, once supply improves. [/QUOTE]
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Results: Cutting a 7mm-08 Barrel From 26" to 20"
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