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Rifles, Reloading, Optics, Equipment
Reloading
New 300 Win Mag with 215 Bergers
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<blockquote data-quote="lancetkenyon" data-source="post: 1715229" data-attributes="member: 68875"><p>So, you have never had a tight bore? I have. And it made a HUGE difference in pressure. </p><p>Just an example. </p><p>I have loaded for 19 different 28 Noslers.</p><p>I always start at 83.0gr RL33. In 17 of the 19, the sweet spot was between 86.0 to 89.0 @ 3080-3160 w. 195s. And out of those 17, all maxed out between 88.0 to 89.0gr. </p><p>But two had tight bores. Same lots of powder, same lots of bullets, same lot of primers, brass was same manufacturer and weights. The first one I started at 83.0, and got slight pressure signs and 3160fps with the first shot and had to go back and pull a bunch apart. A full 3-6 gr LOWER than normal. Final load was 82.4gr @ 3110fps. The other ended up max load at 83.2gr @ 3130fps. </p><p></p><p>So you should start lower than 2 gr of where you think max will be.</p><p></p><p>As for .300WM, only loaded for 8 of them so far. All using either a 210 HVLD or 215 Hyb. All ended up between 74.5 to 77.0gr of H1000. 76.0 to 77.0gr has almost always been max load.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 1715229, member: 68875"] So, you have never had a tight bore? I have. And it made a HUGE difference in pressure. Just an example. I have loaded for 19 different 28 Noslers. I always start at 83.0gr RL33. In 17 of the 19, the sweet spot was between 86.0 to 89.0 @ 3080-3160 w. 195s. And out of those 17, all maxed out between 88.0 to 89.0gr. But two had tight bores. Same lots of powder, same lots of bullets, same lot of primers, brass was same manufacturer and weights. The first one I started at 83.0, and got slight pressure signs and 3160fps with the first shot and had to go back and pull a bunch apart. A full 3-6 gr LOWER than normal. Final load was 82.4gr @ 3110fps. The other ended up max load at 83.2gr @ 3130fps. So you should start lower than 2 gr of where you think max will be. As for .300WM, only loaded for 8 of them so far. All using either a 210 HVLD or 215 Hyb. All ended up between 74.5 to 77.0gr of H1000. 76.0 to 77.0gr has almost always been max load. [/QUOTE]
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Reloading
New 300 Win Mag with 215 Bergers
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