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The Basics, Starting Out
Hello from CO. Building my first 7MM Rem Mag
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<blockquote data-quote="entoptics" data-source="post: 2798228" data-attributes="member: 104268"><p>Typical velocity loss would probably be closer to 25-35 fps per inch, so your estimate is probably on the pessimistic side for going from 26" to 24".</p><p></p><p>I get ~2950 fps out of my 26" bbl with 175 grain bullets. Take 120 fps off that for a 22" bbl that puts you at 3100 ftlbs. To get 3100 ftlbs from a 162 grain bullet requires 2940 fps. Let's be conservative, and call it 2900 fps.</p><p></p><p>At 2900 fps, 4000' elevation, 50° F, you'll have ~2030 fps, and ~1490 ftlbs of energy at 700 yards with a 162 gr ELD-X. That's just a smidge below what I'd call "plenty" for an elk, but I'd certainly feel comfortable taking that shot if I knew I could hit the boiler room.</p><p></p><p>In summary, with your 700 yard limit, and a good sleek bullet (162 ELDX, 168 Berger, 175 ELDX or Nosler ABLR, etc), you should have enough power for reliable expansion and penetration on elk sized game.</p><p></p><p>I vote on being a weirdo, and going with a 23" barrel just so you can be different...<img class="smilie smilie--emoji" loading="lazy" alt="🤪" title="Zany face :zany_face:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f92a.png" data-shortname=":zany_face:" /></p></blockquote><p></p>
[QUOTE="entoptics, post: 2798228, member: 104268"] Typical velocity loss would probably be closer to 25-35 fps per inch, so your estimate is probably on the pessimistic side for going from 26" to 24". I get ~2950 fps out of my 26" bbl with 175 grain bullets. Take 120 fps off that for a 22" bbl that puts you at 3100 ftlbs. To get 3100 ftlbs from a 162 grain bullet requires 2940 fps. Let's be conservative, and call it 2900 fps. At 2900 fps, 4000' elevation, 50° F, you'll have ~2030 fps, and ~1490 ftlbs of energy at 700 yards with a 162 gr ELD-X. That's just a smidge below what I'd call "plenty" for an elk, but I'd certainly feel comfortable taking that shot if I knew I could hit the boiler room. In summary, with your 700 yard limit, and a good sleek bullet (162 ELDX, 168 Berger, 175 ELDX or Nosler ABLR, etc), you should have enough power for reliable expansion and penetration on elk sized game. I vote on being a weirdo, and going with a 23" barrel just so you can be different...🤪 [/QUOTE]
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The Basics, Starting Out
Hello from CO. Building my first 7MM Rem Mag
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