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Rifles, Reloading, Optics, Equipment
Reloading
257 Weatherby and 115 Bergers
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<blockquote data-quote="AZShooter" data-source="post: 1121715" data-attributes="member: 5219"><p>Berger suggests you try VLD in four seating depths to see if you can find a trend.</p><p></p><p>"Load 24 rounds at the following COAL if you are a hunter (pulling a bullet out of the case with your rifling while in the field can be a hunt ending event which must be avoided) or a competition shooter who worries about pulling a bullet during a match:</p><p> 1. .010 off the lands (jump) 6 rounds</p><p> 2. .050 off the lands (jump) 6 rounds</p><p> 3. .090 off the lands (jump) 6 rounds</p><p> 4. .130 off the lands (jump) 6 rounds</p><p></p><p>Shoot 2 (separate) 3 shot groups in fair conditions to see how they group. The remarkable reality of this test is that one of these 4 COALs will outperform the other three by a considerable margin. Once you know which one of these 4 COAL shoots best then you can tweak the COAL +/- .002 or .005. Taking the time to set this test up will pay off when you find that your rifle is capable of shooting the VLD bullets very well (even at 100 yards). "</p><p></p><p>---------------</p><p>I am not sure if you can do any of the above jumps to the lands. I would suggest you seat to fit and feed from magazine and work up a powder charge. Then you could seat incrementally deeper up to a point to see if that helps shrink groups. </p><p></p><p>--------</p><p>My friends and I have built six 257 Weatherbys with a custom reamer and Lilja 3 groove barrels. The jump to the lands is .070" in some to .100" in others. All rifles shoot wonderfully. I believe the throat angle is the main reason. It is a 1 degree 30 min angle. </p><p></p><p> I cannot say how your rifle will perform but our rifles love 115 VLDs. Everyone but me use RL-25. I switched to RL-33 and got a bit more velocity. </p><p>-------------</p><p>Give it a try and let us know how it works out,</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1121715, member: 5219"] Berger suggests you try VLD in four seating depths to see if you can find a trend. "Load 24 rounds at the following COAL if you are a hunter (pulling a bullet out of the case with your rifling while in the field can be a hunt ending event which must be avoided) or a competition shooter who worries about pulling a bullet during a match: 1. .010 off the lands (jump) 6 rounds 2. .050 off the lands (jump) 6 rounds 3. .090 off the lands (jump) 6 rounds 4. .130 off the lands (jump) 6 rounds Shoot 2 (separate) 3 shot groups in fair conditions to see how they group. The remarkable reality of this test is that one of these 4 COALs will outperform the other three by a considerable margin. Once you know which one of these 4 COAL shoots best then you can tweak the COAL +/- .002 or .005. Taking the time to set this test up will pay off when you find that your rifle is capable of shooting the VLD bullets very well (even at 100 yards). " --------------- I am not sure if you can do any of the above jumps to the lands. I would suggest you seat to fit and feed from magazine and work up a powder charge. Then you could seat incrementally deeper up to a point to see if that helps shrink groups. -------- My friends and I have built six 257 Weatherbys with a custom reamer and Lilja 3 groove barrels. The jump to the lands is .070" in some to .100" in others. All rifles shoot wonderfully. I believe the throat angle is the main reason. It is a 1 degree 30 min angle. I cannot say how your rifle will perform but our rifles love 115 VLDs. Everyone but me use RL-25. I switched to RL-33 and got a bit more velocity. ------------- Give it a try and let us know how it works out, [/QUOTE]
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Reloading
257 Weatherby and 115 Bergers
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