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Rifles, Reloading, Optics, Equipment
Reloading
What's Causing Bullet Runout
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<blockquote data-quote="joep17" data-source="post: 1409879" data-attributes="member: 1457"><p>I like this advice. For competition rounds I use a Forester seating die. I try to do it in 3 steps by feel rotating it 1/3 per pull estimating how far I have seated the bullet.</p><p></p><p>I have an old RCBS tool that I though measured run out. It turned out that finger pressure changed results so I threw it in a box and have not looked at it again.</p><p></p><p>One thing I found is the old style pull through does a lot of neck distortion. Bushing dies always help and I think you are using them. I then use a PMI body with a 21 Century expander to try to get consistent neck tension and concentricity. Depending upon brass, neck thickness varies too. I try to neck turn all long range brass even if just to make it consistent and not to a reamer diagram....except for a specific match chamber.</p><p></p><p>Another thing I have forgot about for 30+ years. Around 1984 I got a buddy into reloading. He bought a new RCBS rock chucker presss. After years of poor results he sent it back them. Turned out the collet at the top was out of square and every round had unpredictable run out. They replaced it.</p><p></p><p>No idea how to check that but it as a problem for him.</p><p></p><p>So many variables that are hard to diagnose from the thread.</p><p></p><p>Don't give up and you will find the answer and get great rounds that shoot well. You will get posts based on problems we have encountered but hopefully no one telling you that you are wrong. This darn hobby is like trying to land on the moon. Hard to do but eventually you will do it.</p><p></p><p>Enjoy your quest for accuracy!</p></blockquote><p></p>
[QUOTE="joep17, post: 1409879, member: 1457"] I like this advice. For competition rounds I use a Forester seating die. I try to do it in 3 steps by feel rotating it 1/3 per pull estimating how far I have seated the bullet. I have an old RCBS tool that I though measured run out. It turned out that finger pressure changed results so I threw it in a box and have not looked at it again. One thing I found is the old style pull through does a lot of neck distortion. Bushing dies always help and I think you are using them. I then use a PMI body with a 21 Century expander to try to get consistent neck tension and concentricity. Depending upon brass, neck thickness varies too. I try to neck turn all long range brass even if just to make it consistent and not to a reamer diagram....except for a specific match chamber. Another thing I have forgot about for 30+ years. Around 1984 I got a buddy into reloading. He bought a new RCBS rock chucker presss. After years of poor results he sent it back them. Turned out the collet at the top was out of square and every round had unpredictable run out. They replaced it. No idea how to check that but it as a problem for him. So many variables that are hard to diagnose from the thread. Don't give up and you will find the answer and get great rounds that shoot well. You will get posts based on problems we have encountered but hopefully no one telling you that you are wrong. This darn hobby is like trying to land on the moon. Hard to do but eventually you will do it. Enjoy your quest for accuracy! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What's Causing Bullet Runout
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