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Rifles, Reloading, Optics, Equipment
Gunsmithing
Do I need more freebore?
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<blockquote data-quote="Carey Farmer" data-source="post: 3016148" data-attributes="member: 122715"><p>I shoot 28 Noslers as well. </p><p></p><p>Based on my experience I would say that you need to start out with at least 0.200" of clearance in your magazine. That will allow to keep optimal jump as the lands retreat (as the barrel wears), and also allow for a little slop between the case shoulder and the magazine's case shoulder stop-rib. Otherwise, your case sliding forward upon recoil will whack the bullet tip against the front wall of the magazine.</p><p></p><p>You should also consider using 338 Lapua magazines instead of 300 RUM magazines. The 338 Lapua magazines have the case shoulder stop-rib in about the right place for 28 Nosler cases. 300 RUM cases have either no case shoulder stop-rib at all, or their stop-rib is too far forward to be effective with heavy-for-caliber projectiles. That will allow your cartridge to slam into the front wall of the magazine upon recoil, likely banging the bullet further into your case and changing the bullet's jump to the lands.</p></blockquote><p></p>
[QUOTE="Carey Farmer, post: 3016148, member: 122715"] I shoot 28 Noslers as well. Based on my experience I would say that you need to start out with at least 0.200" of clearance in your magazine. That will allow to keep optimal jump as the lands retreat (as the barrel wears), and also allow for a little slop between the case shoulder and the magazine's case shoulder stop-rib. Otherwise, your case sliding forward upon recoil will whack the bullet tip against the front wall of the magazine. You should also consider using 338 Lapua magazines instead of 300 RUM magazines. The 338 Lapua magazines have the case shoulder stop-rib in about the right place for 28 Nosler cases. 300 RUM cases have either no case shoulder stop-rib at all, or their stop-rib is too far forward to be effective with heavy-for-caliber projectiles. That will allow your cartridge to slam into the front wall of the magazine upon recoil, likely banging the bullet further into your case and changing the bullet's jump to the lands. [/QUOTE]
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Do I need more freebore?
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