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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Is my barrel to long?
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<blockquote data-quote="Mikecr" data-source="post: 703591" data-attributes="member: 1521"><p>What 338 are we talkin about?</p><p></p><p>You might notice with Dan's charts that velocity nodes appear through the range of both 250/300gr bullets. If he had started beyond 46" he would have seen velocity rise continue with the 250gr -beyond 46". I think with a strain gauge he would have seen shockwave pressure peaks/toughs at cycles down the bore. And this would have been different with another powder.</p><p>His 338/378wm would be ~50gr larger than an improved 338-06.</p><p></p><p>Personally, I believe the right barrel length brings a balance between powder burn & tuning quality.</p><p>Too short of a barrel causes ugly bullet release due to high muzzle pressures. This would show up with distance shooting. Too long of a barrel could screw up the chances of reaching good performance, as well as lower probability of first shot accuracy. Trying to counter this with a heavier barrel, means accepting an even heavier gun to produce a gun balance that behaves.</p><p></p><p>If I were building a 338 whatever, I'd find(via internet search) a recipe that happened to work for more than one shooter, and not 'tactical' shooters. Look for shooting at ~1/2moa targets at a mid-ranges like 600-800yds, rather than someone walking shots into 5moa steel a mile away..</p></blockquote><p></p>
[QUOTE="Mikecr, post: 703591, member: 1521"] What 338 are we talkin about? You might notice with Dan's charts that velocity nodes appear through the range of both 250/300gr bullets. If he had started beyond 46" he would have seen velocity rise continue with the 250gr -beyond 46". I think with a strain gauge he would have seen shockwave pressure peaks/toughs at cycles down the bore. And this would have been different with another powder. His 338/378wm would be ~50gr larger than an improved 338-06. Personally, I believe the right barrel length brings a balance between powder burn & tuning quality. Too short of a barrel causes ugly bullet release due to high muzzle pressures. This would show up with distance shooting. Too long of a barrel could screw up the chances of reaching good performance, as well as lower probability of first shot accuracy. Trying to counter this with a heavier barrel, means accepting an even heavier gun to produce a gun balance that behaves. If I were building a 338 whatever, I'd find(via internet search) a recipe that happened to work for more than one shooter, and not 'tactical' shooters. Look for shooting at ~1/2moa targets at a mid-ranges like 600-800yds, rather than someone walking shots into 5moa steel a mile away.. [/QUOTE]
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Is my barrel to long?
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