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270 WİN. question.??????
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<blockquote data-quote="FEENIX" data-source="post: 488625" data-attributes="member: 14204"><p>How many more rounds do you think will make the rifle shoot with a noticeable accuracy? There are so many variables involved (powder type, bore diameter, bullet coatings etc.) that it's hard to predict but here's one that might help ...</p><p></p><p><a href="http://bulletin.accurateshooter.com/2010/11/handy-excel-formula-predicts-useful-barrel-life/" target="_blank">Handy Excel Formula Predicts Useful Barrel Life « Daily Bulletin</a></p><p></p><p>i.e. if the loads are as follows: using 150gr NBT and H4831SC ... (1) 50gr of powder, (2) 55 gr of powder, and (3) 60 of powder, the formula predicts the approximate number of rounds of barrel life as:</p><p></p><p>(1) <strong>2138</strong> for non-moly coated bullet ............. <strong>2613</strong> for moly coated bullet</p><p>(2) <strong>1767</strong> for non-moly coated bullet ............. <strong>2159</strong> for moly coated bullet</p><p>(3) <strong>1484</strong> for non-moly coated bullet ............. <strong>1814</strong> for moly coated bullet</p><p></p><p>In essence, the loaded powder, powder heat potential, and pressure are inversely proportional with the total round count.</p><p></p><p>Good luck!</p><p></p><p>Ed</p></blockquote><p></p>
[QUOTE="FEENIX, post: 488625, member: 14204"] How many more rounds do you think will make the rifle shoot with a noticeable accuracy? There are so many variables involved (powder type, bore diameter, bullet coatings etc.) that it’s hard to predict but here's one that might help ... [URL="http://bulletin.accurateshooter.com/2010/11/handy-excel-formula-predicts-useful-barrel-life/"]Handy Excel Formula Predicts Useful Barrel Life « Daily Bulletin[/URL] i.e. if the loads are as follows: using 150gr NBT and H4831SC ... (1) 50gr of powder, (2) 55 gr of powder, and (3) 60 of powder, the formula predicts the approximate number of rounds of barrel life as: (1) [B]2138[/B] for non-moly coated bullet ............. [B]2613[/B] for moly coated bullet (2) [B]1767[/B] for non-moly coated bullet ............. [B]2159[/B] for moly coated bullet (3) [B]1484[/B] for non-moly coated bullet ............. [B]1814[/B] for moly coated bullet In essence, the loaded powder, powder heat potential, and pressure are inversely proportional with the total round count. Good luck! Ed [/QUOTE]
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