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Rifles, Reloading, Optics, Equipment
Gunsmithing
Reamer design for 338 Norma Mag for 250gr Berger
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<blockquote data-quote="J E Custom" data-source="post: 773628" data-attributes="member: 2736"><p>I don,t consider my self an Expert ether, just with 50 + years experienced and know that Free bore is not the enemy, chamber dimensions are. I don't have a SAMME spec. for the new 338 Norma mag but if memory serves me you should have about .200 thousandths free bore.</p><p></p><p>The 250 grain bullet has a long enough body to reach the lands and still have plenty of bullet</p><p>engagement in the neck the 300s will have to be seated deeper if you shorten the free bore.</p><p></p><p>I don,t want to talk you out of a custom reamer, just warn you about the problems that come with it.</p><p></p><p>For velocity, free bore is your friend, for accuracy with free bore the chamber, especially the head space</p><p>is also your friend.</p><p></p><p>You don,t have to touch the lands to get accuracy.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 773628, member: 2736"] I don,t consider my self an Expert ether, just with 50 + years experienced and know that Free bore is not the enemy, chamber dimensions are. I don't have a SAMME spec. for the new 338 Norma mag but if memory serves me you should have about .200 thousandths free bore. The 250 grain bullet has a long enough body to reach the lands and still have plenty of bullet engagement in the neck the 300s will have to be seated deeper if you shorten the free bore. I don,t want to talk you out of a custom reamer, just warn you about the problems that come with it. For velocity, free bore is your friend, for accuracy with free bore the chamber, especially the head space is also your friend. You don,t have to touch the lands to get accuracy. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Reamer design for 338 Norma Mag for 250gr Berger
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