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338 RCM
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<blockquote data-quote="PapaSmurff" data-source="post: 2821384" data-attributes="member: 118512"><p>Having another 338 RCM built and it should be in my hands in a couple more weeks. This one started out being a Bergara Highlander model in 6.5 PRC. Having it re-barreled with a Bartlein 3b contour 24" long. Also having the magazine box lengthened with a 3.100" Wyatt's extended box so that I can try loading some 250 Bergers at a more appropriate seating depth. Did some mock-ups with brass already and for the 250 Elite Hunters it appears around 3.060" is where the boat tail aligns with the neck/shoulder junction. On my Ruger (same smith; same reamer building this new one) the 250 Bergers jam the lands at 3.150" so there is definitely gonna be plenty of free-bore but not a ridiculous amount. Was wondering if anyone has tried the 250's in the 338 RCM with an appropriate cartridge overall length seating them out I mean to maximize the potential performance with 250 grain bullets yet? I'm also betting N550 or RL-17 will be the best powders but wanted to hear from others who have any real world experience with this cartridge in the 250 grain class of bullets?</p></blockquote><p></p>
[QUOTE="PapaSmurff, post: 2821384, member: 118512"] Having another 338 RCM built and it should be in my hands in a couple more weeks. This one started out being a Bergara Highlander model in 6.5 PRC. Having it re-barreled with a Bartlein 3b contour 24” long. Also having the magazine box lengthened with a 3.100” Wyatt’s extended box so that I can try loading some 250 Bergers at a more appropriate seating depth. Did some mock-ups with brass already and for the 250 Elite Hunters it appears around 3.060” is where the boat tail aligns with the neck/shoulder junction. On my Ruger (same smith; same reamer building this new one) the 250 Bergers jam the lands at 3.150” so there is definitely gonna be plenty of free-bore but not a ridiculous amount. Was wondering if anyone has tried the 250’s in the 338 RCM with an appropriate cartridge overall length seating them out I mean to maximize the potential performance with 250 grain bullets yet? I’m also betting N550 or RL-17 will be the best powders but wanted to hear from others who have any real world experience with this cartridge in the 250 grain class of bullets? [/QUOTE]
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