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<blockquote data-quote="trebark" data-source="post: 1451779" data-attributes="member: 19172"><p>Why change bullets? If you're getting good results with the 139sst, what does changing to the 150eldx do for you?</p><p></p><p>139 G1 = .486</p><p>150 G1 = .574</p><p></p><p>For the sake of conversation, I ran the ballistics for each bullet using JBM Ballistics. Using 300fps for the 139 and 2850 for the 150. Using this data, the 139 is flatter out to 1000 yards and the 150 is about 9% better in the wind.</p><p></p><p>Add to this, that the maximum effective range of both combinations is ~750 yards on deer, leads me back to my original question...why change bullets?</p><p></p><p>As an example, I built a 300RUM and shot 208Amax in it. MANY people wondered why I wasn't shooting the 215 or 230 berger hybrids. The answer was simple, run the ballistics and you will find the 208 has better ballistics out to ~1200 yards before the superior BC of the other bullets take over. Given that I wouldn't shoot at deer size game past 1000yards, there's little reason for shooting the bigger bullets.</p><p></p><p><a href="https://www.longrangehunting.com/threads/my-300rum-by-mcr.70809/" target="_blank">https://www.longrangehunting.com/threads/my-300rum-by-mcr.70809/</a></p></blockquote><p></p>
[QUOTE="trebark, post: 1451779, member: 19172"] Why change bullets? If you're getting good results with the 139sst, what does changing to the 150eldx do for you? 139 G1 = .486 150 G1 = .574 For the sake of conversation, I ran the ballistics for each bullet using JBM Ballistics. Using 300fps for the 139 and 2850 for the 150. Using this data, the 139 is flatter out to 1000 yards and the 150 is about 9% better in the wind. Add to this, that the maximum effective range of both combinations is ~750 yards on deer, leads me back to my original question...why change bullets? As an example, I built a 300RUM and shot 208Amax in it. MANY people wondered why I wasn't shooting the 215 or 230 berger hybrids. The answer was simple, run the ballistics and you will find the 208 has better ballistics out to ~1200 yards before the superior BC of the other bullets take over. Given that I wouldn't shoot at deer size game past 1000yards, there's little reason for shooting the bigger bullets. [URL]https://www.longrangehunting.com/threads/my-300rum-by-mcr.70809/[/URL] [/QUOTE]
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