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Long Range Hunting & Shooting
Sendero 300 RUM; Shoot it, re-barrel it, or build new?
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<blockquote data-quote="lancetkenyon" data-source="post: 1346973" data-attributes="member: 68875"><p>I used to be a "superfast and light" lover. Where a 180 would shine for shorter distances in a .300RUM. </p><p></p><p>Now I am a "fast and heavy" lover. Here is my reasoning. </p><p></p><p>Here are some ballistics with altitude of approx 7000' AMSL (23.42 baro), 60°F, 50% humidity, with a 10mph 90° wind. Very viable elk hunting situation. In fact, the exact conditions I just shot my bull on Friday in. Less the wind. But I used my 7RM pushing a 180 Hybrid @ 2996 for my 662 yard shot. My .300RUM is for the long shot should the need arise.</p><p></p><p>Berger (and a lot of other bullets) suggests 1800ft/sec minimum velocity for reliable expansion. And most "experts" will say 1500ft/lbs of energy minimum for elk. Your opinions might vary. Mine do slightly as well.</p><p></p><p>185 HVLD @ 3360fps MV with a G1 BC of .549 (what my old.load was) vs. 230 Hybrid @ 3068fps MV with a G1 BC of .743 (my current load).</p><p></p><p>Drop in inches, drop in MIL, wind drift, retained velocity, retained energy</p><p></p><p>Let's first start with your 500 yards range that you suggested as most hunter's max shot. Which I agree with as well. </p><p></p><p>185 HVLD @ 3360fps w. 235 yd zero</p><p>-23.2" drop, U1.3 MIL, 9.2" drift, 2654fps, 2895ft/lbs</p><p></p><p>230 Hybrid @ 3068fps w. 235 yd zero</p><p>-27.0" drop, U1.5 MIL, 7.2" drift, 2569fps, 3371ft/lbs</p><p></p><p>Both are plenty for elk. </p><p>3.8" less drop for the 185</p><p>2" less drift for the 230</p><p>85fps faster for the 185</p><p>476 more ft/lbs of energy for the 230</p><p></p><p>But now let's go out to maximum suggested range for the 185 and see how that compares.with the 230. Same conditions.</p><p></p><p>185 around 1130 yards</p><p>-238.9" drop, 5.9MIL, 52.1" drift, 1908fps, 1495ft/lbs</p><p></p><p>230 @ 1130 yards</p><p>255.5" drop, 6.3MIL, 40.3" drift, 2015fps, 2073ft/lbs</p><p></p><p>16.6" less drop for 185</p><p>11.8" less drift for 230</p><p>107 more fps for 230</p><p>578 more ft/lbs for 230</p><p></p><p>And last, let's go out to suggested max for the 230 and compare. 1400 yards</p><p></p><p>185 </p><p>435.4" drop, U8.6MIL, 85.0" drift, 1634fps, 1096.9ft/lbs</p><p></p><p>230 Hybrid</p><p>-448.9" drop, U8.9MIL, 64.9" drift, 1801.8fps, 1657.9ft/lbs </p><p></p><p>13.5" less drop for 185</p><p>20.1" less drift for 230</p><p>167 more fps 230</p><p>561 ft/lbs more 230</p><p></p><p>I would take a bit more drop but less wind drift and much higher energy transfer on target for elk myself. </p><p></p><p>I do admit, it is at a higher recoil factor that is definitely noticeable while shooting from a bench. By you won't notice it for the one shot you take on game when the adrenaline is flowing. </p><p></p><p>Just my preferences.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 1346973, member: 68875"] I used to be a "superfast and light" lover. Where a 180 would shine for shorter distances in a .300RUM. Now I am a "fast and heavy" lover. Here is my reasoning. Here are some ballistics with altitude of approx 7000' AMSL (23.42 baro), 60°F, 50% humidity, with a 10mph 90° wind. Very viable elk hunting situation. In fact, the exact conditions I just shot my bull on Friday in. Less the wind. But I used my 7RM pushing a 180 Hybrid @ 2996 for my 662 yard shot. My .300RUM is for the long shot should the need arise. Berger (and a lot of other bullets) suggests 1800ft/sec minimum velocity for reliable expansion. And most "experts" will say 1500ft/lbs of energy minimum for elk. Your opinions might vary. Mine do slightly as well. 185 HVLD @ 3360fps MV with a G1 BC of .549 (what my old.load was) vs. 230 Hybrid @ 3068fps MV with a G1 BC of .743 (my current load). Drop in inches, drop in MIL, wind drift, retained velocity, retained energy Let's first start with your 500 yards range that you suggested as most hunter's max shot. Which I agree with as well. 185 HVLD @ 3360fps w. 235 yd zero -23.2" drop, U1.3 MIL, 9.2" drift, 2654fps, 2895ft/lbs 230 Hybrid @ 3068fps w. 235 yd zero -27.0" drop, U1.5 MIL, 7.2" drift, 2569fps, 3371ft/lbs Both are plenty for elk. 3.8" less drop for the 185 2" less drift for the 230 85fps faster for the 185 476 more ft/lbs of energy for the 230 But now let's go out to maximum suggested range for the 185 and see how that compares.with the 230. Same conditions. 185 around 1130 yards -238.9" drop, 5.9MIL, 52.1" drift, 1908fps, 1495ft/lbs 230 @ 1130 yards 255.5" drop, 6.3MIL, 40.3" drift, 2015fps, 2073ft/lbs 16.6" less drop for 185 11.8" less drift for 230 107 more fps for 230 578 more ft/lbs for 230 And last, let's go out to suggested max for the 230 and compare. 1400 yards 185 435.4" drop, U8.6MIL, 85.0" drift, 1634fps, 1096.9ft/lbs 230 Hybrid -448.9" drop, U8.9MIL, 64.9" drift, 1801.8fps, 1657.9ft/lbs 13.5" less drop for 185 20.1" less drift for 230 167 more fps 230 561 ft/lbs more 230 I would take a bit more drop but less wind drift and much higher energy transfer on target for elk myself. I do admit, it is at a higher recoil factor that is definitely noticeable while shooting from a bench. By you won't notice it for the one shot you take on game when the adrenaline is flowing. Just my preferences. [/QUOTE]
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Sendero 300 RUM; Shoot it, re-barrel it, or build new?
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