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Hunting
Long Range Hunting & Shooting
Shrink group size...some advice or help.
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<blockquote data-quote="palerider3" data-source="post: 1736584" data-attributes="member: 82117"><p>Reading through this thread a number of things have struck me. First, I see you loading groups of different powders and charges all over the place. If it were me I'd start by picking a powder and the bullet you want and shooting a ladder through a chronograph to find the node. Load 1 round at each charge weight .3 grains apart and shoot them one every 2 or 3 minutes till you see the first sign of pressure. Then look over the results and pick a charge weight in the middle of the node. Then load 4 rounds each .020", .035" and .050" off the lands and shoot for groups with those. If that doesn't get me the results I want, something is wrong. I had a Schneider barrel that a sponsor spun up for me on my PRS rifle that did the same thing. Nothing would shoot well. After checking everything else I finally measured the fired brass and if was the same diameter as a loaded case. I called the Smith and had him measure the reamer and found the reamer was mis marked. I had .0005 neck clearance and the bullet wasn't releasing freely and it caused all kinds of issues. Unfortunately we didn't have time to get another reamer and I ended up neck turning a whole pile of brass. Shot great after that. Might be something for you to check. Have you contacted your gunsmith? Most reputable Smith's would want to know of a gun shooting this badly and would probably want to check out the gun. As frustrating as this may be, I definitely wouldn't write off proof barrels forever over this either as there's a lot more variables than the barrel and you'd be more likely to find a gunsmithing issue than a actual bad barrel. Hope you figure it out.</p></blockquote><p></p>
[QUOTE="palerider3, post: 1736584, member: 82117"] Reading through this thread a number of things have struck me. First, I see you loading groups of different powders and charges all over the place. If it were me I'd start by picking a powder and the bullet you want and shooting a ladder through a chronograph to find the node. Load 1 round at each charge weight .3 grains apart and shoot them one every 2 or 3 minutes till you see the first sign of pressure. Then look over the results and pick a charge weight in the middle of the node. Then load 4 rounds each .020", .035" and .050" off the lands and shoot for groups with those. If that doesn't get me the results I want, something is wrong. I had a Schneider barrel that a sponsor spun up for me on my PRS rifle that did the same thing. Nothing would shoot well. After checking everything else I finally measured the fired brass and if was the same diameter as a loaded case. I called the Smith and had him measure the reamer and found the reamer was mis marked. I had .0005 neck clearance and the bullet wasn't releasing freely and it caused all kinds of issues. Unfortunately we didn't have time to get another reamer and I ended up neck turning a whole pile of brass. Shot great after that. Might be something for you to check. Have you contacted your gunsmith? Most reputable Smith's would want to know of a gun shooting this badly and would probably want to check out the gun. As frustrating as this may be, I definitely wouldn't write off proof barrels forever over this either as there's a lot more variables than the barrel and you'd be more likely to find a gunsmithing issue than a actual bad barrel. Hope you figure it out. [/QUOTE]
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Shrink group size...some advice or help.
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