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<blockquote data-quote="Brent" data-source="post: 976" data-attributes="member: 99"><p>Fifty,</p><p></p><p>The Jeffery has a rebated rim, it's smaller in diameter than the big WBY, Lapua or Rigby rim so it actually produces "less" bolt thrust when operating at the same pressure, .575" I think it measures. The Gibbs/CheyTac case rim is just way too big though. Another plus for the Jeffery case.</p><p></p><p>Have you ever had any problems with the 300gr SMK bullets being oversize and chambering in a tight freebore? You said .0002 over bullet diameter; I assume you measure the bullets and don't just figure they'll be .338 when specing the reamers? </p><p></p><p>All the 300's my brother has bought have been at least .3385, most all are usually about .3388 though. They throated his after reaming the chamber, so they had problems using the .3385 freebore/throater with the oversize bullets and getting the OAL right, as the bullet would give a false reading it was so tight. </p><p></p><p>Maybe I'll try some Retumbo and RL25 in his rifle for him while he's gone working in Nome this summer. Hmmmm, maybe I'll get very attached to it by hunting season this fall and just use it instead of my 300 Ultra. Heck, maybe I'll just use his 500 Jeffery and some AMAX's! Oh the choices I'm gonna have this fall. <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>I think you'll get 3000-3100 fps pretty easy based on what he gets from his, and be pretty easy on brass too.</p></blockquote><p></p>
[QUOTE="Brent, post: 976, member: 99"] Fifty, The Jeffery has a rebated rim, it's smaller in diameter than the big WBY, Lapua or Rigby rim so it actually produces "less" bolt thrust when operating at the same pressure, .575" I think it measures. The Gibbs/CheyTac case rim is just way too big though. Another plus for the Jeffery case. Have you ever had any problems with the 300gr SMK bullets being oversize and chambering in a tight freebore? You said .0002 over bullet diameter; I assume you measure the bullets and don't just figure they'll be .338 when specing the reamers? All the 300's my brother has bought have been at least .3385, most all are usually about .3388 though. They throated his after reaming the chamber, so they had problems using the .3385 freebore/throater with the oversize bullets and getting the OAL right, as the bullet would give a false reading it was so tight. Maybe I'll try some Retumbo and RL25 in his rifle for him while he's gone working in Nome this summer. Hmmmm, maybe I'll get very attached to it by hunting season this fall and just use it instead of my 300 Ultra. Heck, maybe I'll just use his 500 Jeffery and some AMAX's! Oh the choices I'm gonna have this fall. [img]images/icons/grin.gif[/img] I think you'll get 3000-3100 fps pretty easy based on what he gets from his, and be pretty easy on brass too. [/QUOTE]
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