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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 falling on it's face
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<blockquote data-quote="therifleman556" data-source="post: 1490381" data-attributes="member: 101898"><p>I'm over 100 rounds into the rifle now. The last trip out I tried to find max pressure with 4831. I hit 44.0 grains (3.5 over book) and still only hit 2870. I think there's still room to run (no signs of hard bolt lift or primer flattening, etc...) but I'll move onto RL 26 instead. </p><p></p><p>I revisited Ramshot Hunter with the 75s and managed 3500 fps with magnum primers and .2 grains left in the book. Accuracy was very good but ES was 40+. I may try to tweak that a couple tenths and try a primer swap. I'm not too worried about hair splitting accuracy with that bullet. I'll finish off the pound of Hunter and probably move on to other choices. </p><p></p><p>On a possibly related note: I started neck sizing with a Lee collet die. I used those cases to begin work with RL 26 and the 107s. I noticed the neck tension was much lighter, once the bullet was started it only took a finger's worth of pressure on the handle to get them seated. This isn't to say that the other loads seated hard, but is excess neck tension causing more pressure to be wasted getting the bullet out of the case to begin with?</p></blockquote><p></p>
[QUOTE="therifleman556, post: 1490381, member: 101898"] I'm over 100 rounds into the rifle now. The last trip out I tried to find max pressure with 4831. I hit 44.0 grains (3.5 over book) and still only hit 2870. I think there's still room to run (no signs of hard bolt lift or primer flattening, etc...) but I'll move onto RL 26 instead. I revisited Ramshot Hunter with the 75s and managed 3500 fps with magnum primers and .2 grains left in the book. Accuracy was very good but ES was 40+. I may try to tweak that a couple tenths and try a primer swap. I'm not too worried about hair splitting accuracy with that bullet. I'll finish off the pound of Hunter and probably move on to other choices. On a possibly related note: I started neck sizing with a Lee collet die. I used those cases to begin work with RL 26 and the 107s. I noticed the neck tension was much lighter, once the bullet was started it only took a finger's worth of pressure on the handle to get them seated. This isn't to say that the other loads seated hard, but is excess neck tension causing more pressure to be wasted getting the bullet out of the case to begin with? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 falling on it's face
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