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Rifles, Reloading, Optics, Equipment
Reloading
7mm Reg Mag Frustrations
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<blockquote data-quote="Timeout" data-source="post: 1414060" data-attributes="member: 50852"><p>Unless I have missed it, I'm surprised that no one had mentioned using Berger's recommendation for testing seating depth on VLD'S. Also, being a hunting rifle, it makes no sense to start your testing "into the lands". Berger recommends to start .010" off the lands for hunting rifles. Load 6 @ .010" off, 6 @ .050" off, 6 @ .090" off, and 6 @ .130" off. It is likely one of those depths will group significantly better than the rest. When you have determined which depth that is, fine tune from there. I recently performed that sequence on a custom barreled hunting rifle and the .130" off was far and away the best group. Next was .010" off. The other 2 we're terrible. I use this same method with competition rifles and VLD'S, only starting at .010" into the lands and then move away .040" at a time. Had one rifle that shot very well .010" into the lands, but even better @.120" off. I'm convinced that the VLD'S are very sensitive to seating depth. I'm also in the camp for doing a ladder test to determine charge weight before seating depth testing. The problem with that sometimes is a rifle that shoots so badly it is impossible to find the nodes. You can verify what I have said about depth testing VLD'S on Berger's website or better yet, purchase their reloading manual. Good luck on your testing!</p></blockquote><p></p>
[QUOTE="Timeout, post: 1414060, member: 50852"] Unless I have missed it, I'm surprised that no one had mentioned using Berger's recommendation for testing seating depth on VLD'S. Also, being a hunting rifle, it makes no sense to start your testing "into the lands". Berger recommends to start .010" off the lands for hunting rifles. Load 6 @ .010" off, 6 @ .050" off, 6 @ .090" off, and 6 @ .130" off. It is likely one of those depths will group significantly better than the rest. When you have determined which depth that is, fine tune from there. I recently performed that sequence on a custom barreled hunting rifle and the .130" off was far and away the best group. Next was .010" off. The other 2 we're terrible. I use this same method with competition rifles and VLD'S, only starting at .010" into the lands and then move away .040" at a time. Had one rifle that shot very well .010" into the lands, but even better @.120" off. I'm convinced that the VLD'S are very sensitive to seating depth. I'm also in the camp for doing a ladder test to determine charge weight before seating depth testing. The problem with that sometimes is a rifle that shoots so badly it is impossible to find the nodes. You can verify what I have said about depth testing VLD'S on Berger's website or better yet, purchase their reloading manual. Good luck on your testing! [/QUOTE]
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7mm Reg Mag Frustrations
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