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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM load development questions
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<blockquote data-quote="Lefty7mmstw" data-source="post: 777518" data-attributes="member: 48043"><p>Yep, the accuracy is usually better as the muzzle pressure is lower. But, the 300 rum and 7 stw are nearly identical in their overbore nature, and as the graphs I posted on the 4000 fps stw thread indicate, the KPSI at the muzzle is only around 10,000 with a rl25 speed powder, so I doubt you will see more than 1 or 2 KPSI drop in pressure with a 4350 type powder. With a mid-mag like a 7rem or 300 win this is a very good way to play, but as overbore as we are here I get more worried about open space in the case than a slightly lower muzzle pressure.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 777518, member: 48043"] Yep, the accuracy is usually better as the muzzle pressure is lower. But, the 300 rum and 7 stw are nearly identical in their overbore nature, and as the graphs I posted on the 4000 fps stw thread indicate, the KPSI at the muzzle is only around 10,000 with a rl25 speed powder, so I doubt you will see more than 1 or 2 KPSI drop in pressure with a 4350 type powder. With a mid-mag like a 7rem or 300 win this is a very good way to play, but as overbore as we are here I get more worried about open space in the case than a slightly lower muzzle pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM load development questions
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