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Rifles, Reloading, Optics, Equipment
Reloading
IMR 4831 VS H4831SC
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<blockquote data-quote="Stammster" data-source="post: 2440731" data-attributes="member: 114381"><p>All those charges seem a little light to achieve the stated velocities (by up to 2 grains). I suspect Sierra used a long barrel, or a case with a lower H20 capacity.</p><p></p><p>Or the powder they used was hotter than average. I've also read the new H4831 is a little slower than the original surplus - which might explain it also. However even the H4350 seems off by a few grains.</p><p></p><p>On the other end, the Hornady #8 manual lists 62gr as the max for their 130gr bullet - which is very similar to the Sierra. I think it is little aggressive, and the Sierra conservative.</p><p></p><p>As I said before, I believe the factory ammo you are trying to duplicate used a 4350 class powder.</p><p></p><p>Although everyone says H4831 is the go to powder for 270 Win, in the 130 class bullet I've found H4350 slightly more accurate with similar velocities.</p></blockquote><p></p>
[QUOTE="Stammster, post: 2440731, member: 114381"] All those charges seem a little light to achieve the stated velocities (by up to 2 grains). I suspect Sierra used a long barrel, or a case with a lower H20 capacity. Or the powder they used was hotter than average. I’ve also read the new H4831 is a little slower than the original surplus - which might explain it also. However even the H4350 seems off by a few grains. On the other end, the Hornady #8 manual lists 62gr as the max for their 130gr bullet - which is very similar to the Sierra. I think it is little aggressive, and the Sierra conservative. As I said before, I believe the factory ammo you are trying to duplicate used a 4350 class powder. Although everyone says H4831 is the go to powder for 270 Win, in the 130 class bullet I’ve found H4350 slightly more accurate with similar velocities. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
IMR 4831 VS H4831SC
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