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Rifles, Reloading, Optics, Equipment
Reloading
WARNING - 4955
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<blockquote data-quote="Calvin45" data-source="post: 2771438" data-attributes="member: 109862"><p>I'll post more details in a separate thread and won't be doing load refining or real accuracy testing for a while now. </p><p></p><p>But I can tell you this from four powders tried:</p><p></p><p></p><p>Superformance was entirely unsuitable for this application </p><p></p><p>H4831 was very useable but won't realize the velocity possible as it's still too slow a burn rate for this application - never thought I'd see 4831 being on the slow side for ANY .257 wby load. </p><p></p><p>H4350 hit the highest velocity before starting to show pressure signs - just heavy cratering, no stiff bolt or anything like that - nonetheless hit unacceptable pressure indicators at 4277 feet per second</p><p></p><p>H380 realized almost as high a velocity as 4350 and consistently at 2-3 grains lighter charges. But showed pressure at slightly lower velocities, still way over 4000 fps. </p><p></p><p>I am not going to proceed further until I also try rl17 as I have a sneaking suspicion it might be the king. However, it is not in my hands yet - I've already paid for it, but need to get to the city to pick it up haha. </p><p></p><p>If rl17 disappoints it's between h4350 and h380, whichever is most accurate I guess, the difference in velocity between the max of each was not enough to matter to me. </p><p></p><p>[USER=41385]@ButterBean[/USER] was right…again….</p><p></p><p>I never would have dared to put h380 in a 257 wby if it weren't for that menace! Oops, I mean, if it weren't for that man!</p></blockquote><p></p>
[QUOTE="Calvin45, post: 2771438, member: 109862"] I’ll post more details in a separate thread and won’t be doing load refining or real accuracy testing for a while now. But I can tell you this from four powders tried: Superformance was entirely unsuitable for this application H4831 was very useable but won’t realize the velocity possible as it’s still too slow a burn rate for this application - never thought I’d see 4831 being on the slow side for ANY .257 wby load. H4350 hit the highest velocity before starting to show pressure signs - just heavy cratering, no stiff bolt or anything like that - nonetheless hit unacceptable pressure indicators at 4277 feet per second H380 realized almost as high a velocity as 4350 and consistently at 2-3 grains lighter charges. But showed pressure at slightly lower velocities, still way over 4000 fps. I am not going to proceed further until I also try rl17 as I have a sneaking suspicion it might be the king. However, it is not in my hands yet - I’ve already paid for it, but need to get to the city to pick it up haha. If rl17 disappoints it’s between h4350 and h380, whichever is most accurate I guess, the difference in velocity between the max of each was not enough to matter to me. [USER=41385]@ButterBean[/USER] was right…again…. I never would have dared to put h380 in a 257 wby if it weren’t for that menace! Oops, I mean, if it weren’t for that man! [/QUOTE]
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Reloading
WARNING - 4955
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