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Long Range Hunting & Shooting
Load for 270 too hot?
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<blockquote data-quote="catorres1" data-source="post: 1345430" data-attributes="member: 80699"><p>I am working up a new load for my son's 270. 140 ABLR. They are loaded out quite a bit farther than book length, also only bumped shoulder back, so minimally resized.</p><p></p><p>Not actually concerned about getting max velocity, but as I did load development, the SD's and ES's kept getting smaller and smaller. My final load, which was .5 grains higher than book had some of the lowest SD's and ES's of any load I have made (which is not saying much, but still).</p><p></p><p>There was no sticky bolt, but I noticed the primers had a slight edge around the strike point, what I would assume is cratering. You can't really see it without a magnifying glass, but you can feel it if you scrape it with your fingernail. BTW, the primers are WLR's, I've noticed they seem pretty soft.</p><p></p><p>Velocities were also very slightly (15 fps) faster than book max for this load, which also concerns me. Usually, I load up to book max velocity if there are no pressure signs, but in this case my case capacity is increased, no doubt, so I think I should be able to get a bit more.</p><p></p><p>I would not bother thinking about this load if it were not for the great SD's and ES's. And were it not for the feel of the primer, I would not worry, as extraction was just like the minimum loads.</p><p></p><p>Thoughts? Thanks!</p></blockquote><p></p>
[QUOTE="catorres1, post: 1345430, member: 80699"] I am working up a new load for my son's 270. 140 ABLR. They are loaded out quite a bit farther than book length, also only bumped shoulder back, so minimally resized. Not actually concerned about getting max velocity, but as I did load development, the SD's and ES's kept getting smaller and smaller. My final load, which was .5 grains higher than book had some of the lowest SD's and ES's of any load I have made (which is not saying much, but still). There was no sticky bolt, but I noticed the primers had a slight edge around the strike point, what I would assume is cratering. You can't really see it without a magnifying glass, but you can feel it if you scrape it with your fingernail. BTW, the primers are WLR's, I've noticed they seem pretty soft. Velocities were also very slightly (15 fps) faster than book max for this load, which also concerns me. Usually, I load up to book max velocity if there are no pressure signs, but in this case my case capacity is increased, no doubt, so I think I should be able to get a bit more. I would not bother thinking about this load if it were not for the great SD's and ES's. And were it not for the feel of the primer, I would not worry, as extraction was just like the minimum loads. Thoughts? Thanks! [/QUOTE]
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Load for 270 too hot?
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